How to create a data table in mysql database

The method for creating a data table in mysql database is: It can be created through the CREATE TABLE statement. The basic syntax: [CREATE TABLE

([table definition option])[table option][partition option] ;]. It should be noted that keywords in the SQL language cannot be used to create data tables.

In MySQL, you can use the CREATE TABLE statement to create a table. The syntax format is:

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CREATE TABLE <表名> ([表定义选项])[表选项][分区选项];

Among them, the format of [table definition option] is:

<列名1> <类型1> [,…] <列名n> <类型n>

CREATE TABLE command has a lot of syntax, which is mainly composed of table creation definition (create-definition), table options (table-options) and partition options (partition-options).

The main syntax and usage instructions of the CREATE TABLE statement are as follows:

CREATE TABLE: used to create a table with a given name, you must have table CREATE permissions.

: Specifies the name of the table to be created, given after CREATE TABLE, and must comply with the identifier naming rules. The table name is specified as db_name.tbl_name to create the table in a specific database. It can be created this way regardless of whether there is a current database.

When creating a table in the current database, db-name can be omitted. If you use quoted distinguished names, the database and table names should be quoted separately. For example, 'mydb'.'mytbl' is legal, but 'mydb.mytbl' is not.

: Table creation definition, consisting of column name (col_name), column definition (column_definition), and possible null value specifications, integrity constraints, or table indexes composition. By default, the table is created in the current database. If the table already exists, there is no current database, or the database does not exist, an error will occur.

Tip: When using CREATE TABLE to create a table, you must specify the following information:

• The name of the table to be created is not case-sensitive and cannot Use keywords in SQL language, such as DROP, ALTER, INSERT, etc.

• The name and data type of each column (field) in the data table. If you create multiple columns, separate them with commas.

Example:

For example, create the employee table tb_emp1 with the structure as shown in the following table.

Select the database test_db to create the table, create the tb_emp1 data table, and enter the SQL statement and running results as shown below.

mysql> USE test_db;
Database changed
mysql> CREATE TABLE tb_emp1
    -> (
    -> id INT(11),
    -> name VARCHAR(25),
    -> deptId INT(11),
    -> salary FLOAT
    -> );
Query OK, 0 rows affected (0.37 sec)

After the statement is executed, a data table named tb_emp1 is created. Use the SHOW TABLES; statement to check whether the data table is created successfully, as shown below.

mysql> SHOW TABLES;
+--------------------+
| Tables_in_test_db  |
+--------------------+
| tb_emp1            |
+--------------------+
1 rows in set (0.00 sec)

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