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https://github.com/tgrziminiar/database

Last synced: about 11 hours ago
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Host: GitHub
URL: https://github.com/tgrziminiar/database
Owner: TGRZiminiar
Created: 2024-03-23T20:03:12.000Z (8 months ago)
Default Branch: main
Last Pushed: 2024-04-03T19:03:28.000Z (7 months ago)
Last Synced: 2024-04-18T09:28:43.832Z (7 months ago)
Language: PHP
Size: 133 KB
Stars: 0
Watchers: 1
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
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README

        ## Start only some service

docker compose up -d db

## Command to execute container mysql

```

docker exec -it (service name) mysql -u (user name) -p

docker exec -it db mysql -u root -p

123

```

## Show Database 

```

SHOW DATABASES;

```

DROP DATABASE IF EXISTS conference;

CREATE DATABASE conference

DEFAULT CHARACTER SET utf8

DEFAULT COLLATE utf8_general_ci;

USE conference;

CREATE TABLE IF NOT EXISTS `tb_account` (

    `_id` int(11) NOT NULL AUTO_INCREMENT,

    `email` text NOT NULL,

    `password` text NOT NULL,

    `code` text NOT NULL,

    `title_name` text NOT NULL,

    `first_name` text NOT NULL,

    `middle_name` text,

    `last_name` text NOT NULL,

    `address` text,

    `city` text,

    `postal_code` text,

    `country` text NOT NULL,

    PRIMARY KEY (`_id`)

);

DESCRIBE tb_account;

ALTER TABLE tb_account 

CHANGE _id account_id int(11);

DESCRIBE tb_account;

## To set default value timestamp 0000-00-00 00:00:00

SELECT @@GLOBAL.sql_mode global, @@SESSION.sql_mode session;

SELECT @@GLOBAL.sql_mode;

SET sql_mode = 'ONLY_FULL_GROUP_BY,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

SET GLOBAL sql_mode = 'ONLY_FULL_GROUP_BY,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

CREATE TABLE IF NOT EXISTS `tb_paper` (

    `_id` int(11) NOT NULL,

    `account_id` int(11) NOT NULL,

    `created` timestamp DEFAULT CURRENT_TIMESTAMP,

    `modified` timestamp DEFAULT '0000-00-00 00:00:00',

    `category` int(11) NOT NULL,

    `title` text NOT NULL,

    `author` text NOT NULL,

    `present` int(11) NOT NULL,

    `correspond` int(11) NOT NULL,

    `emailcorr` text NOT NULL,

    `abstract` text NOT NULL,

    `status` int(11) NOT NULL,

    PRIMARY KEY (`_id`)

);

ALTER TABLE tb_paper

modify _id int(11) NOT NULL;

ALTER TABLE tb_paper 

CHANGE _id paper_id int(11);

ALTER TABLE tb_paper ADD PRIMARY KEY (account_id);

8.

![alt text](image.png)

select OBJECT_NAME(OBJECT_ID) AS NameofConstraint

FROM sys.objects

where OBJECT_NAME(parent_object_id)='tb_paper'

and type_desc LIKE '%CONSTRAINT'

alter table Persion drop CONSTRAINT 

ALTER TABLE `tb_paper` DROP PRIMARY KEY;

ALTER TABLE `tb_paper` ADD PRIMARY KEY (`account_id`, `_id`);

ALTER TABLE `tb_paper` ADD PRIMARY KEY ( SkillID, SkillName );

ALTER TABLE tb_paper DROP PRIMARY KEY, ADD PRIMARY KEY(paper_id, account_id);

SHOW COLUMNS from tb_paper;

ALTER TABLE table_name DROP COLUMN column_name;

13. Delete modified , present , and correspond . Show your command and captured screen of the table after deleting

columns.

Example statement:

ALTER TABLE tb_paper

DROP COLUMN modified,

DROP COLUMN present,

DROP COLUMN correspond;

DESC tb_paper;

14. Change the data type of status from int(11) to Boolean . Show your command and captured screen. Note that the

status column is used for storing either 0 (False) or 1 (True).

Example statement:

ALTER TABLE tb_paper MODIFY status Boolean NOT NULL;

16. Execute following statement. Show your result. What is the command used for?

ALTER TABLE tb_paper ADD comment VARCHAR(60) AFTER abstract;

17. Create a table named tb_category with two attributes; category_id and category . The primary key is category_id

and its data type is int(11) with AUTO_INCREMENT . And the data type of category is TEXT . Show your CREATE

statement.

CREATE TABLE IF NOT EXISTS `tb_category` (

    `category_id` int(11) AUTO_INCREMENT,

    `category` text,

    PRIMARY KEY (`category_id`)

);

18. Add the list of categories as shown in the figure below into tb_category using an INSERT statement. Show your

command.

INSERT INTO tb_category (category)

VALUES ('Chemistry'),

       ('Biology'),

       ('Physics'),

       ('Mathematics'),

       ('Computing and Information Technology');

SELECT * FROM tb_category;

DELETE FROM tb_category;

20. Add a foreign key constraint on the category column of tb_paper table which points to the category_id column of

the tb_category table by using ALTER TABLE statement.

ALTER TABLE tb_paper ADD FOREIGN KEY

(category) REFERENCES

tb_category(category_id);

21. Add a foreign key constraint on the account_id column of tb_paper table which points to the account_id

column of tb_account table. Show your statement and captured result.

SELECT COLUMN_

ALTER TABLE tb_paper ADD FOREIGN KEY

(account_id) REFERENCES

tb_account(account_id);

22. Execute statement below. Show your result. What is it used for? What is the constraint name of the foreign

key of tb_paper table?

For a Table:

SELECT COLUMN_NAME, CONSTRAINT_NAME, REFERENCED_COLUMN_NAME, REFERENCED_TABLE_NAME

FROM information_schema.KEY_COLUMN_USAGE

WHERE TABLE_NAME = 'tb_paper';

For a Column:

SELECT 

  TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME

FROM

  INFORMATION_SCHEMA.KEY_COLUMN_USAGE

WHERE

  REFERENCED_TABLE_SCHEMA = (SELECT DATABASE()) AND

  REFERENCED_TABLE_NAME = '' AND

  REFERENCED_COLUMN_NAME = '' \G

23. Use the following statement. Note that your have to replace constraint_name with the actual constraint name of the foreign

key of tb_paper table found in Step 22. Show your result.

ALTER TABLE tb_paper

DROP FOREIGN KEY tb_paper_ibfk_2,

ADD CONSTRAINT `fk_account_id` FOREIGN KEY (`account_id`) REFERENCES `tb_account`(`account_id`);

24. Then, repeat the same statement in Step 22 again. Do you see any changes? What is it? What is the statement in Step 23

used for?

ALTER TABLE tb_paper

DROP FOREIGN KEY tb_paper_ibfk_2,

ADD CONSTRAINT `fk_account_id` FOREIGN KEY (`account_id`) REFERENCES `tb_account` (`account_id`);

25. Insert any dummy data into the tables tb_account and tb_paper by using INSERT statement.

INSERT INTO tb_account (

    account_id,

    email,

    password,

    code,

    title_name,

    first_name,

    middle_name,

    last_name,

    address,

    city,

    postal_code,

    country

)

VALUES (

    1,

    "[email protected]",

    "123",

    "456",

    "this is title",

    "chitsanupong",

    "mix",

    "jateassavapirom",

    "99/73 Pathumthani",

    "Pathumthani",

    "12130",

    "Thailand"

),(

    2,

    "[email protected]",

    "123123",

    "456456",

    "this is title2",

    "chitsanupong2",

    "mix2",

    "jateassavapirom2",

    "99/73 Pathumthani2",

    "Pathumthani2",

    "121302",

    "Thailand2"

);

INSERT INTO tb_paper (

    paper_id,

    account_id,

    category,

    title,

    author,

    emailcorr,

    abstract,

    comment,

    status

)

VALUES (

    1,

    1,

    1,

    "this is title",

    "chitsanupong",

    "[email protected]",

    "this is abstract",

    "this is comment",

    1

);