After creating or selecting a database, proceed to create a MySQL table. For example, to create a table named "employee" with two columns: "id" and "name", run the following statement: CREATE TABLE employee ( id INT AUTO_INCREMENT, name VARCHAR(50) NOT NULL, PRIMARY KEY(id) ) ENGINE...
CREATETABLEIFNOTEXISTSnewauthor(aut_idvarchar(8)NOTNULL,aut_namevarchar(50)NOTNULL,countryvarchar(25)NOTNULLCHECK(countryIN('USA','UK','India')),home_cityvarchar(25)NOTNULL,PRIMARYKEY(aut_id,home_city)); 模糊取值约束 CREATETABLEIFNOTEXISTSnewbook_mast(book_idvarchar(15)NOTNULLUNIQUE,book_n...
CREATE TABLE [IF NOT EXISTS] table_name( column_definition1, column_definition2, …….., table_constraints ); 也可简写为: CREATE TABLE table_name (column_name column_type); 上述语法的参数说明如下: 以下例子中我们将在 RUNOON 数据库中创建数据...
In MySQL, the name of aPRIMARY KEYisPRIMARY. For other indexes, if you do not assign a name, the index is assigned the same name as the first indexed column, with an optional suffix (_2,_3,...) to make it unique. You can see index names for a table usingSHOW INDEX FROMtbl_nam...
Storage enginesmay place additional constraints on this limit, reducing the effective maximum row size. MySQL DESCRIBE statement MySQL DESCRIBE statement is used to show the structure of the created table. Syntax: DESCRIBE [table_name]; The following statement will display the structure of a given ...
MySQL 兼容模式临时表和 Oracle 兼容模式临时表一样,当前 Session 访问临时表之后,后续 SQL 只能发往当前 Session。 临时表数据清理 当Session 断开时会自动将本 Session 创建的临时表 DROP 掉。 已知问题 CREATE TABLE AS SELECT 中有临时表可能存在创建表为空的情况。 上一篇 CREATE SEQUENCE 下一篇 CREATE TABLE...
The syntax for creating a table in MySQL is as follows: CREATE TABLE [IF NOT EXISTS] table_name( column_name type, olumn_name type, ... constraints ) In this syntax: The‘IF NOT EXISTS’clause will prevent errors if a table in that database with the same name already exists. ...
CREATE TABLE creates a table with the given name. You must have the CREATE privilege for the table. By default, tables are created in the default database, using the InnoDB storage engine. An error occurs if the table exists, if there is no default database, or if the database does ...
Category:MySQL Server: GeneralSeverity:S3 (Non-critical) Version:server version: 5.0.27-communityOS:Windows (Windows XP) Assigned to:CPU Architecture:Any [17 Jan 2007 1:45] Sahaya Thivearaj Description:Hi, I am trying to create table with CHECK constraints, but it creates the table without...
CREATE TABLE creates an initially empty table in the current database. The table will be owned by the creator.For details about the data types supported by column-store t