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https://github.com/sarwar-asik/all-sql
PostgressSQL, Prisma , Express, Typescript , husky, JWT included in the project
https://github.com/sarwar-asik/all-sql
expressjs husky jwt-authentication logger-middleware postgresql prisma typescript
Last synced: 2 days ago
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PostgressSQL, Prisma , Express, Typescript , husky, JWT included in the project
- Host: GitHub
- URL: https://github.com/sarwar-asik/all-sql
- Owner: sarwar-asik
- Created: 2023-08-13T15:48:46.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2023-09-27T18:56:52.000Z (about 1 year ago)
- Last Synced: 2023-09-28T06:15:49.871Z (about 1 year ago)
- Topics: expressjs, husky, jwt-authentication, logger-middleware, postgresql, prisma, typescript
- Language: PLpgSQL
- Homepage:
- Size: 62.5 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
## SQL Note ::::
**main_repo**
https://github.com/sarwar-asik/DB-INFO
> SQL Database command (CREATE,UPDATE,GET,DELETE,AGGREGATE,JOINING) ::::
```sql
DROP DATABASE university_manaagement2;
CREATE DATABASE test1;
ALTER DATABASE test1 RENAME TO test3
```
##### create table ::::
```sql
CREATE TABLE student (
student_id INT,
first_name VARCHAR(40),
last_name VARCHAR(30),
cgpa NUMERIC(1,2)
)
```
##### update table name ::
ALTER TABLE learners RENAME TO student;
###### Delete a table ::::
```sql
DROP TABLE student;
CREATE TABLE
"user1"(
user_id SERIAL,
user_name VARCHAR(255) NOT NULL,
email VARCHAR(255) NOT NULL,
age int DEFAULT 18,
);
```
##### insert into user1 (1,'abc', '[email protected]',20)
##### SELECT \* from user1;
```sql
INSERT INTO
"user1" (user_id, user_name, email, age)
VALUES (
2,
'sarwar',
'[email protected]',
24
);
INSERT INTO
user1 (user_name, email)
VALUES (
'muktadir vai',
'[email protected]'
), (
'mohammad',
'[email protected]'
);
```
##### ALTER TABLE user1
##### add COLUMN password VARCHAR(255) DEFAULT 'admin1234' NOT NULL
alter TABLE user1 DROP COLUMN age;
##### SELECT \* from user1
##### TRUNCATE TABLE user1
ALTER TABLE user1 add COLUMN demo int;
ALTER TABLE user1 ALTER COLUMN demo TYPE TEXT;
ALTER TABLE user1 alter column country set DEFAULT 'bangladesh';
insert into user1 values (5,'Imdad','[email protected]');
##### rename a column ADD
ALTER TABLE user1 RENAME COLUMN demo to country;
##### add constrains
ALTER TABLE user1 alter COLUMN country set NOT NULL;
ALTER TABLE user1 add constraint unique_email UNIQUE(email);
##### Employee Table ::::
##### Employee table under to a department ::::
CREATE TABLE
Department(
deptID SERIAL PRIMARY KEY,
deptName VARCHAR(50)
);
##### create table data of department:::
```sql
INSERT into department VALUES(1,'IT');
DELETE from department WHERE deptID =1 ;
SELECT * from department;
CREATE TABLE
Employee(
empID SERIAL PRIMARY KEY,
empName VARCHAR(50) NOT NULL,
departmentID INT,
CONSTRAINT fk_constraints_dept FOREIGN KEY (departmentID) REFERENCES Department(deptID)
);
```
##### create employe table data::::
INSERT INTO Employee VALUES(1,'KHorshed',1);
SELECT * from employee;
##### course table ::::
##### create course table::::
CREATE Table courses (
course_id SERIAL PRIMARY KEY,
course_name VARCHAR(255) NOT NULL,
description VARCHAR(255),
published_date DATE
);
#####- create courses table data ::::
INSERT INTO courses(course_name,description, published_date)
VALUES
('frontend developer','A complete frontend developer','2023-07-13'),
('backend developer','A complete backend developer',NULL),
('complete web developer','A complete web developer','2023-05-10');
##### update a table data ::::
UPDATE courses
set
description ='be a smart tech learner'
WHERE course_id > 1 or course_id < 5
;
##### delete a data ::::
```sql
DELETE FROM courses
WHERE course_id = 4;
CREATE table IF NOT EXISTs department(
deptID SERIAL PRIMARY KEY,
name TEXT not NULL
);
INSERT INTO department (deptname)
VALUES
('Marketing'),
('Finance'),
('Sales');
CREATE TABLE if not exists employee(
empID SERIAL PRIMARY key,
name text not null,
email TEXT NOT NULL,
salary INTEGER NOT NULL,
joining_date date not NULL,
deptID INTEGER not NULL,
constraint fk_deptID
FOREIGN KEY(deptID)
REFERENCES department(deptID)
);
INSERT INTO employee (name, email, salary, joining_date, deptID)
VALUES
('Samuel Harris', '[email protected]', 52000, '2024-02-20', 1),
('Grace Turner', '[email protected]', 54000, '2024-03-12', 2),
('Liam Mitchell', '[email protected]', 61000, '2024-04-25', 3),
('Emma Adams', '[email protected]', 49000, '2024-05-30', 1),
('Logan Cook', '[email protected]', 57000, '2024-06-05', 2),
('Chloe Bennett', '[email protected]', 53000, '2024-07-18', 3);
```
# smart query from databse ::::::
##### get all data :::
SELECT * from department;
##### get selected data :::::
SELECT name,email,joining_date from employee;
##### condition query::::
SELECT * from employee
WHERE salary > 55000 and salary < 60000 and name <> 'Olivia';
##### WHERE name <> 'Olivia;'
##### ascending order by sorting :::::
SELECT * FROM employee
ORDER BY name
ASC;
##### #### pagination :"::"
SELECT * FROM employee
ORDER BY name
DESC LIMIT 5 OFFSET 1;
##### maximum salary sorting ::::
SELECT * FROM employee ORDER BY salary DESC
LIMIT 1;
##### Get first 3 maximum salary sorting ::::
SELECT * FROM employee ORDER BY salary DESC
LIMIT 1 OFFSET 2;
## IN , NOT, BETWEEN, LIKE
##### get without 2,3,5 empid employee(NOT IN)::::
SELECT * from employee
WHERE empid NOT IN (2,3,5,10);
##### BETWEEN get salary customize::::
SELECT * from employee
WHERE salary BETWEEN 50000 AND 60000;
##### get data contain 'Ja' LIKE ::::
SELECT * from employee
WHERE name LIKE '%Ja%';
##### get data started with 'j'(match only first CHARACTER) LIKE ::::
SELECT * from employee
WHERE name LIKE 'J%';
##### get data end with 's'(match only last CHARACTER) LIKE ::::
SELECT * from employee
WHERE name LIKE '%s';
##### specipic position :::
##### find "m" in 2nd position ::::
SELECT * from employee
WHERE name LIKE '_m%';
##### find "m" in 3rd position ::::
SELECT * from employee
WHERE name LIKE '__m%';
##### get data started with 'J' and end with 's' LIKE
SELECT * from employee
WHERE name LIKE 'J%s';
##### get NULL data ::::
SELECT * from employee WHERE deptid IS NUll;
## JOINIng Concept :::::
CREATE Table department2(
department_id INT PRIMARY KEY,
department_name VARCHAR(100)
);
INSERT INTO department2 (department_id, department_name)
VALUES
(1, 'Executive'),
(2, 'HR'),
(3, 'Sales'),
(4, 'Development'),
(5, 'Support'),
(6, 'Research');
CREATE Table employee2(
employee_id INT PRIMARY KEY,
full_name VARCHAR(200),
department_id INT,
job_role VARCHAR(100),
manager_id INT,
FOREIGN KEY (department_id) REFERENCES department2(department_id)
);
##### create employee table data
INSERT INTO employee2 (employee_id, full_name, department_id, job_role, manager_id)
VALUES
(1, 'John Doe', 3, 'Sales Manager', NULL),
(2, 'Jane Smith', 2, 'HR Specialist', 1),
(3, 'Michael Johnson', 4, 'Software Developer', 1),
(4, 'Alice Brown', 2, 'HR Assistant', 2),
(5, 'Robert White', 3, 'Sales Representative', 1),
(6, 'Emily Williams', 4, 'Software Engineer', 3),
(7, 'Daniel Lee', 5, 'Technical Support Specialist', 6),
(8, 'Sophia Martinez', 6, 'Research Scientist', NULL),
(9, 'David Johnson', 3, 'Sales Representative', 1),
(10, 'Olivia Brown', 4, 'Software Developer', 3),
(11, 'James Smith', 5, 'Technical Support Specialist', 6),
(12, 'Ella Garcia', 2, 'HR Specialist', 2),
(13, 'Matthew Davis', 4, 'Software Engineer', 3),
(14, 'Ava Wilson', 6, 'Research Scientist', NULL),
(15, 'Liam Mitchell', 3, 'Sales Representative', 5);
SELECT * from department2;
SELECT * from employee2;
##### start joining concept ::::
SELECT employee2.full_name,employee2.job_role,employee2.manager_id,department2.department_name
FROM employee2
INNER JOIN department2 ON department2.department_id = employee2.department_id ;
##### left join ::::
SELECT *
FROM employee2
LEFT JOIN department2 ON department2.department_id = employee2.department_id ;
##### RIGHT join ::::
SELECT *
FROM employee2
RIGHT JOIN department2 ON department2.department_id = employee2.department_id ;
##### FULL join ::::
SELECT *
FROM employee2
FULL JOIN department2 ON department2.department_id = employee2.department_id ;
##### Natural JOIN ::::
SELECT *
from employee
NATURAL JOIN department2;
##### CROSS JOIN ::::
SELECT * from employee CROSS JOIN department2;
##### AGGREGATE Function ::::
SELECT * from employee;
##### get average salary :::
SELECT AVG(salary) as AverageSalary from employee;
##### get MAX salary :::
SELECT MAX(salary) as MaximumSalary from employee;
##### get SUM salary :::
SELECT SUM(salary) as TotalSalary from employee;
##### group avarage data ;
SELECT deptid, AVG(salary) from employee GROUP BY deptid;
##### Aggregate with joining ::::
```sql
SELECT d.deptname, avg(e.salary),sum(e.salary) as TOtalSalary,max(e.salary),min(e.salary),count(*) from employee e
FULL JOIN department d on e.deptid = d.deptid
GROUP BY d.deptname ;
```
**or WITH CONDITION**
```sql
SELECT d ,sum(salary),count(*) from department d
FULL JOIN employee e on e.deptid = d.deptid
GROUP BY d.deptid HAVING sum(e.salary) > 40000
```