MySql to create data tables

Learn more MySql statements: https://blog.csdn.net/weixin_45761237/category_11726248.html?spm=1001.2014.3001.5482

Use create table to create a table

create table tablename([table definition options])[table options][partition options])

Create a student table with the following structure and content

Table structure

Field Name

Data Type

Notes

id

int

student id

name

varcher

Student name

age

int

Age

Table content

id

name

age

1

Zhao

15

2

money

16

3

Sun

18

Syntax

1. Create a table (simple)

CREATE TABLE student ( id INT ( 12 ), NAME VARCHAR ( 25 ), age INT ( 12 ) );

2. Create a table (delete the previous table first, and then execute this command, otherwise a conflict will occur)

Note: When creating a MySql table, the symbol ` outside the table name and field name is not a single quote, but an anti-single quote in the state of the English input method, which is the ~ button below the esc button in the upper left corner of the keyboard

p>

CREATE TABLE IF NOT EXISTS `student` (`id` INT(12) UNSIGNED AUTO_INCREMENT COMMENT 'student id',`name` VARCHAR ( 255 ) NOT NULL COMMENT 'student name',`age` INT ( 12 ) COMMENT 'age',PRIMARY KEY ( `id` )) ENGINE = INNODB DEFAULT CHARSET = utf8;

UNSIGNED AUTO_INCREMENT means non-null auto-increment

PRIMARY KEY ( `id`) set id as primary key

ENGINE set storage engine

CHARSET sets the encoding

COMMENT comments

NOT NULL is not empty

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