https://github.com/brian-emarquez/postgresql-training

Learn PostgreSQL and how to get started quickly through practical examples.
https://github.com/brian-emarquez/postgresql-training
pgadmin4 postgresql
Last synced: 4 months ago
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Learn PostgreSQL and how to get started quickly through practical examples.
Host: GitHub
URL: https://github.com/brian-emarquez/postgresql-training
Owner: brian-emarquez
License: other
Created: 2021-05-20T19:21:21.000Z (over 4 years ago)
Default Branch: main
Last Pushed: 2024-05-31T21:11:04.000Z (over 1 year ago)
Last Synced: 2025-07-11T21:36:09.936Z (6 months ago)
Topics: pgadmin4, postgresql
Homepage: https://github.com/brian-emarquez
Size: 13.2 MB
Stars: 4
Watchers: 3
Forks: 2
Open Issues: 0
Metadata Files:
- Readme: README.md
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README

          
 🐘 PostgreSQL Training 




  

  

    

  

  

    

  

  

    

  

    

  

  

    

  

  

    

  

  

   

    

    

  


  

  



  

    

      

    

  

[PostgreSQL Documentation](https://www.postgresql.org/docs/current/index.html)

## Table of Contents

| Numeration   | Check       | Stiker        |    Topic      |   Quantization   |    Edit Gitpot    |    Downloads    |  link  |

| ------------ |-------------|-------------- |----------------- |------------------ |---------------- |-------------- |------------- |

|  001   |:heavy_check_mark: | | [Downloads](#Downloads)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  002   |:heavy_check_mark: | | [Usando la DB](#Usando-la-DB)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  003   |:heavy_check_mark: | | [Visualizar Informacion Tablas](#Visualizar-Informacion-Tablas)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  004   |:heavy_check_mark: | | [SELECT](#SELECT)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  005   |:heavy_check_mark: | | [SELECT DISTINCT](#SELECT-DISTINCT)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  006   |:heavy_check_mark: | | [SELECT COUNT](#SELECT-COUNT)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  007   |:heavy_check_mark: | | [WHERE](#WHERE)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  008   |:heavy_check_mark: | | [ORDER BY](#ORDER-BY)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  009   |:heavy_check_mark: | | [LIMIT](#LIMIT)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  010   |:heavy_check_mark: | | [BETWEEN](#BETWEEN)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  011   |:heavy_check_mark: | | [IN](#IN)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  012   |:heavy_check_mark: | | [LIKE](#LIKE)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  013   |:heavy_check_mark: | | [HAVING](#HAVING)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  014   |:heavy_check_mark: | | [GROUP BY](#GROUP-BY)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  015   |:heavy_check_mark: | | [AS](#AS)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

## Union de Tablas

| Numeration   | Check       | Stiker        |    Topic      |   Quantization   |    Edit Gitpot    |    Downloads    |  link  |

| ------------ |-------------|-------------- |----------------- |------------------ |---------------- |-------------- |------------- |

|  016   |:heavy_check_mark: | | [AS](#AS)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  017   |:heavy_check_mark: | | [INNER JOIN](#INNER-JOIN)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  018   |:heavy_check_mark: | | [FULL JOIN](#FULL-JOIN)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  019   |:heavy_check_mark: | | [LEFT JOIN](#LEFT-JOIN)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  020   |:heavy_check_mark: | | [RIGHT JOIN](#RIGHT-JOIN)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  021   |:heavy_check_mark: | | [UNION](#UNION)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

## Funciones 

| Numeration   | Check       | Stiker        |    Topic      |   Quantization   |    Edit Gitpot    |    Downloads    |  link  |

| ------------ |-------------|-------------- |----------------- |------------------ |---------------- |-------------- |------------- |

|  022   |:heavy_check_mark: | | [Formato Hora Fecha](#Formato-Hora-Fecha)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  023   |:heavy_check_mark: | | [Funciones Matematicas](#Funciones-Matematicas)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  024   |:heavy_check_mark: | | [Funciones Caracteres](#Funciones-Caracteres)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  025   |:heavy_check_mark: | | [Subconsulta Valor numerico](#Subconsulta-Valor-numerico)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  026   |:heavy_check_mark: | | [Subconsulta por lista de Valores](#Subconsulta-por-lista-de-Valores)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  027   |:heavy_check_mark: | | [Subconsulta con EXITS](#Subconsulta-con-EXITS)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

## Base de Datos

| Numeration   | Check       | Stiker        |    Topic      |   Quantization   |    Edit Gitpot    |    Downloads    |  link  |

| ------------ |-------------|-------------- |----------------- |------------------ |---------------- |-------------- |------------- |

|  028   |:heavy_check_mark: | | [Bases de Datos](#Bases-de-Datos)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  029   |:heavy_check_mark: | | [Crear Tabla SQL](#Crear-Tabla-SQL)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  030   |:heavy_check_mark: | | [Insert SQL](#Insert-SQL)   | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  031   |:heavy_check_mark: | | [UPDATE](#UPDATE )  | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  032   |:heavy_check_mark: | | [DELETE](#DELETE )  | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  033   |:heavy_check_mark: | | [ALTER](#ALTER )  | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  034   |:heavy_check_mark: | | [CASE](#CASE )  | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  035   |:heavy_check_mark: | | [COALESCE](#COALESCE)  | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  036   |:heavy_check_mark: | | [CAST](#CAST)  | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  037   |:heavy_check_mark: | | [Importar Ficheros](#Importar-Ficheros)  | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

|  038   |:heavy_check_mark: | | [Exportar Ficheros](#Exportar-Ficheros)  | ✔️    | 💻 | 💾 | [ ⬅️ back](https://github.com/brian-emarquez)| 

---

## Downloads

⚙️ [Install PostgreSQL Linux ](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-20-04-es) How to install and use PostgreSQL on Ubuntu


⚙️ [Install PostgreSQL Windows](https://www.postgresql.org/download/windows/) Download the installer for windows 


  

    

      

    

  

  

    

      

    

  

**Correccion del Error PATH** 


_Cambiar la Direccion del PATH de PostgreSQL_

  

    

      

    

  

## Linux installation - Ubuntu (Intallation/Comandos)

* [Comandos consola Postgres](https://apuntes-snicoper.readthedocs.io/es/latest/programacion/postgresql/comandos_consola_psql.html) 

**Install Postgres**

* [Install Postgres Actual en Ubuntu](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-20-04-es)

* [Install Postgres 14 en Ubuntu](https://techviewleo.com/how-to-install-postgresql-database-on-ubuntu/)

* [Install Docker](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04-es)

* [Install Doker Compose](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-compose-on-ubuntu-20-04)

**Delete Postgres**

* [Uninstall ubuntu Terminal Postgres Simple](https://www.enmimaquinafunciona.com/pregunta/30210/como-quitar-a-postgres-de-mi-instalacion)

* [Eliminar Postgres Completamente](https://www.enmimaquinafunciona.com/pregunta/30210/como-quitar-a-postgres-de-mi-instalacion)

**Restore Database**

```sql

pg_restore -h 127.0.0.1 -p 5432 -U user -d database < backup.sql

psql -h 127.0.0.1 -p 5432 -U user -W -d dabatase < backup.sql

```

**Backup Base de Datos**

```sql

pg_dump -U postgres -W -h 127.0.0.1 database > backup.sql

```

**Create Postgres Password**

```bash

sudo -u postgres psql

\password

Enter password: ...

```

**Inicializar Postgres - Ubuntu terminal**

```bash

 service postgresql start

 service postgresql status

 service postgresql stop

 ```

 **Usar Postgres**

_Cambie a la cuenta de postgres_

 ```bash

sudo -i -u postgres

 ```

_Acceder de inmediato a una línea de comandos de PostgresSQL_

```bash

psql

```

_ver base de datos_

_Acceder de inmediato a una línea de comandos de PostgresSQL_

```bash

\l

```

_entrar a la base de datos_

_Acceder de inmediato a una línea de comandos de PostgresSQL_

```bash

\dt 

```

**Create Postgres User**

* [DigitalOcean](https://www.digitalocean.com/community/tutorials/como-configurar-django-con-postgres-nginx-y-gunicorn-en-ubuntu-18-04-es)

* [Como crear usuarios en PostgreSQL](https://www.todopostgresql.com/crear-usuarios-en-postgresql/)

```sql

CREATE USER newuser WITH PASSWORD 'password';

GRANT ALL PRIVILEGES ON DATABASE database to newuser;

```

**Ver Usuarios**

```sql

SELECT usename FROM pg_user;

```

**Rename a database**

```sql

ALTER DATABASE olddbname RENAME TO newdbname;

```

**Delete user postgres**

* [Como crear usuarios en PostgreSQL](https://codeandoando.com/usuarios-y-permisos-en-postgresql/)

**Configuration Information**

 La utilidad postgresql pg_lsclusters muestra información sobre la configuración y el estado de todos los clusters, incluyendo el número de puerto. 


```sql

$ pg_lsclusters

```

**Migrating from SQLite to Postgresql - Django**

Migrating data from SQlite to PostgreSQL. Shift database from SQlite to PostgreSQL in Django

[Migrating data from SQlite to PostgreSQL | Django](https://www.youtube.com/watch?v=BGEEzjGadYI&ab_channel=StudyGyaan)

_Data.json_

```sql

python manage.py dumpdata > data.json

```

_Example Setting Django_

```sql

DATABASES = {

    'default': {

        'ENGINE': 'django.db.backends.postgresql_psycopg2',

        'NAME': 'p2phelp_db',

        'USER': 'briandb',

        'PASSWORD': 'briandb',

        'HOST': 'localhost',

        'PORT': '5432'

    }

}

```

_Python Django Shell_

```sql

python manage.py migrate --run-syncdb

```

```sql

python manage.py shell

```

```sql

from django.contrib.contenttypes.models import ContentType

ContentType.objects.all().delete()

exit()

```

```sql

python manage.py loaddata data.json

```

---

## Usando la DB

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|002         | [Usando la DB](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/002%20Usando%20la%20BD)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## Visualizar Informacion Tablas

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|003         | [Visualizar Informacion Tablas](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/003%20Visualizar%20Informacion%20Tablas)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## SELECT

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|004         | [SELECT](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/004%20SELECT)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## SELECT DISTINCT

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|005         | [SELECT DISTINCT](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/005%20SELECT%20DISTINCT)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## SELECT COUNT

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|006         | [SELECT COUNT](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/006%20SELECT%20COUNT)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## WHERE

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|007         | [WHERE](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/007%20WHERE)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## ORDER BY

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|008         | [ORDER BY](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/008%20ORDER%20BY)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## LIMIT

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|009         | [LIMIT](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/009%20LIMIT)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## BETWEEN

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|010         | [BETWEEN](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/010%20BETWEEN)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## IN

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|011        | [IN](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/011%20IN)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## LIKE

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|012        | [LIKE](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/012%20LIKE)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## GROUP-BY

```sql

SELECT "PRODUCTO", SUM("IMPORTE")

FROM esquema."PEDIDOS"

GROUP BY "PRODUCTO"

```

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|013        | [GROUP-BY](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/013%20GROUP%20BY)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## HAVING

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|014        | [HAVING](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/014%20HAVING)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## Union de Tablas

## AS

```SQL

SELECT "ID" AS "CLAVE", "PRODUCTO" AS "VALOR 0", "IMPORTE"  AS "VALOR 1" 

from esquema."PEDIDOS"

```

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|015        | [AS](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/015%20AS)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## INNER JOIN

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|016        | [INNER JOIN](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/015%20AS)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## FULL JOIN

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|017        | [FULL JOIN](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/017%20FULL%20JOIN)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## LEFT JOIN

  

    

      

    

  

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|018        | [LEFT JOIN](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/018%20LEFT%20JOIN)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## RIGHT JOIN

  

    

      

    

  

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|019        | [RIGHT JOIN](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/019%20RIGHT%20LEFT)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## UNION

  

    

      

    

  

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|020        | [UNION](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/020%20UNION)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Table-of-Contents) |

## Funciones 

## Formato Hora Fecha

```SQL

SELECT EXTRACT (DAY FROM "FECHA") AS "DIAA"

FROM esquema."PEDIDOS" -- EXTRAE EL DIA

```

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|021         | [Formato Hora Fecha](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/021%20Formato%20Hora%20Fecha)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## Funciones Matematicas

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|022         | [Funciones Matematicas](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/022%20Funcion%20matematicas)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## Funciones Caracteres

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|023         | [Funciones Caracteres](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/023%20Funciones%20Caracteres)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

##  Subconsulta Valor numerico

  

    

      

    

  

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|024         | [Subconsulta Valor numerico](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/024%20Subconsulta%20Valor%20numerico)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## Subconsulta por lista de Valores

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|025         | [Subconsulta por lista de Valores](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/025%20Sunconsulta%20por%20lista%20de%20Valores)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## Subconsulta con EXITS

```SQL

-- Subconsulta con EXITS

SELECT "NOMBRE", "APELLIDO1", "DEP"

from esquema."PERSONAS" as p

where EXISTS

(SELECT * FROM esquema."DEPARTAMENTOS" as D

WHERE D."DEP" = P."DEP")

```

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|026         | [Subconsulta con EXITS](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/026%20Subconsulta%20con%20EXITS)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## Bases de Datos

**PostgreSQL CHECK constraint for new tables**

```sql

DROP TABLE IF EXISTS employees;

CREATE TABLE employees (

	id SERIAL PRIMARY KEY,

	first_name VARCHAR (50),

	last_name VARCHAR (50),

	birth_date DATE CHECK (birth_date > '1900-01-01'),

	joined_date DATE CHECK (joined_date > birth_date),

	salary numeric CHECK(salary > 0)

);

```

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|027         | [Base de Datos](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/027%20Base%20de%20datos)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## Crear Tabla SQL

  

    

      

    

  

_Tabla Usuarios_

```sql

Create table usuarios(

	id_usuario SERIAL PRIMARY KEY,

	nombre VARCHAR(45) not NULL,

	apellido1 VARCHAR(45) not NULL,

	apellido2 VARCHAR(45) not NULL,

	contraseña VARCHAR(45) not NULL,

	Email VARCHAR(45) unique NOT NULL,

	Fecha_cracion TIMESTAMP  unique NOT NULL

)

```

_Tabla Ocupaciones_

```sql

CREATE TABLE ocupaciones(

	id_ocupaciones serial PRIMARY KEY,

	tipo_ocupacion VARCHAR(45) not NULL, 

	Descrpcion VARCHAR(100) not NULL

)

```

_Tabla Usuario -ocupaciones (FOREING KEY)_

```sql

CREATE Table usuario_ocupaciones(

	id_usuario INTEGER REFERENCES usuarios(id_usuario), -- hace referencia

	id_ocupacion INTEGER REFERENCES ocupaciones(id_ocupacion)

) 

```

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|028         | [Crear Tabla SQL](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/028%20Crear%20Tabla%20SQL)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## Insert SQL

_Insertar a la Tabla Usuarios_

```sql

INSERT INTO usuarios(nombre, apellido1, apellido2, contraseña, email, fecha_creacion)

values('Brian', 'marquez', 'inca roca', '123', 'brian@mail.com', CURRENT_TIMESTAMP)

_Insertar a la Tabla Usuarios_

INSERT INTO usuarios(nombre, apellido1, apellido2, contraseña, email, fecha_creacion)

values('Maria', 'Isabel', 'Isabel', '456', 'maria@mail.com', CURRENT_TIMESTAMP)

```

_Insertar a la Tabla Ocupaciones_

```sql

Insert Into ocupaciones(tipo_ocupacion, descripcion)

values ('DBA', 'Reliaza Mantenimiento a la base de datos')

```

```sql

Insert into usuario_ocupaciones(id_usuario, id_ocupacion)

values (1,1)

```

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|029         | [Insert SQL](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/029%20Insertar%20SQL)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## UPDATE

```sql

select * from usuarios

update usuarios set email='brianenrique@mail.com'

where id_usuario = 1

```

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|30         | [Insert SQL](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/030%20Actualizar%20UPDATE)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## DELETE

```sql

Insert Into ocupaciones(tipo_ocupacion, descripcion)

values ('programador', 'Reliaza Mantenimiento de lo sistemas')

Insert Into ocupaciones(tipo_ocupacion, descripcion)

values ('programador 2', 'Reliaza Mantenimiento a la base de datos 2')

/* delete */

delete from ocupaciones

where id_ocupacion = 3

```

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|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|31         | [DELETE](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/031%20Borrar%20DELETE)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## ALTER

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|32         | [ALTER](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/032%20ALTER)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## CASE

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|33        | [CASE](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/033%20CASE)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## COALESCE

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|34        | [COALESCE](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/034%20COALESCE)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## CAST

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|35        | [CAST](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/034%20COALESCE)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## Importar Ficheros

  

    

      

    

  

  

    

      

    

  

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

|:----------:|:------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|:-----------:|

|36        | [Importar Ficheros](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/036%20Importar%20Ficheros)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

## Exportar Ficheros

  

    

      

    

  

|Numeration  | File   |  Link       |    Folk     |  Code       | Version     | State       | Download    |  Go back    |

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|37        | [Exportar Ficheros](https://github.com/brian-emarquez/PostgreSQL-Training/tree/main/037%20Export%20Ficheros)  | ✔️  | ✔️ | yes | yes | ✔️ | 💾 | [⬅️Atras](#Funciones) |

---

## Ubuntu

  

    

      

    

  

- Install Terminal

Install Terminal 1 - [Digitalocean](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-20-04-es)

Install Terminal 2 - [PostgreSQL](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-20-04-es)

* Comandos

_Crear Usuario_

Para crear un usuario de PostgreSQL, utilice la siguiente instrucción SQL:

```sql

CREATE USER myuser WITH PASSWORD 'secret_passwd';

```

También puede crear un usuario con la siguiente instrucción SQL:

```sql

CREATE ROLE myuser WITH LOGIN PASSWORD 'secret_passwd';

```

## Books

  

      Server

      Name

      Authors

      Editorial

      ISBN

      Link

  

   

      OneDrive

      Mastering PostgreSQL 13

      Paul Deitel, Harvey Deitel

      Packt

      N 978-1-80056-749-8

      Mastering PostgreSQL 13

  

---

## Paypal Donation

🩸 Hacer una donación [PAYPAL](https://www.paypal.com/donate?hosted_button_id=98U3T62494H9Y) 🍵

---

 

    

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