ALTER TABLE APPUSER MODIFY APPUSERID int(11) unsigned AUTO_INCREMENT, AUTO_INCREMENT=1000; Mysql version is 4.0.23 Thanks. Subject Views Written By Posted Adding AUTO_INCREMENT to existing column 11534 Rostislav Khaskin March 16, 2005 12:29PM ...
Example 1: Add a column to a new table. CREATETABLEEmployees(employee_idINTAUTO_INCREMENTPRIMARYKEY,first_NameVARCHAR(255),last_NameVARCHAR(255)); In the above example, we have built anEmployeestable with the fieldsemployee_id,first_Name, andlast_Name. This will auto-generate theemployee_id...
-- 创建表 CREATE TABLE students ( id INT AUTO_INCREMENT PRIMARY KEY, -- 主键,自动递增 name VARCHAR(50) NOT NULL, -- NOT NULL约束 age INT CHECK (age > 0), -- CHECK约束 gender ENUM('男', '女'), -- 枚举类型 class VARCHAR(20), score FLOAT DEFAULT 0, -- 默认值 created_at TIME...
-- Step 1: 创建临时表CREATETABLEtemp_users(idINTPRIMARYKEYAUTO_INCREMENT,usernameVARCHAR(50),emailVARCHAR(255),phoneVARCHAR(15),passwordVARCHAR(255));-- Step 2: 复制数据到临时表INSERTINTOtemp_users(id,username,email,phone,password)SELECTid,username,'','',passwordFROMusers;-- Step 3: 删除旧...
| id | int(11) | NO | PRI | NULL | auto_increment | | name | varchar(20) | YES | | NULL | | +---+---+---+---+---+---+ 2 ,解决方法 insert into man values (NULL,'来福'); 或 insert into man values (1,'来福'); 1, 表结构 man 2 ,解决方法 WukakaIT技术类博客 ...
Let’s take a look some examples of adding a new column to an existing table.MySQL ADD COLUMN examples#First, we create a table named vendors for the demonstration purpose using the following statement:1 2 3 4 CREATE TABLE IF NOT EXISTS vendors ( id INT AUTO_INCREMENT PRIMARY KEY, name...
(ER_TABLE_CANT_HANDLE_AUTO_INCREMENT) 消息:所使用的表类型不支持AUTO_INCREMENT列。 · 错误:1165 SQLSTATE: HY000 (ER_DELAYED_INSERT_TABLE_LOCKED) 消息:由于用LOCK TABLES锁定了表,INSERT DELAYED不能与表’%s’一起使用。 · 错误:1166 SQLSTATE: 42000 (ER_WRONG_COLUMN_NAME) ...
删除字段:altertable表名dropcolumn字段名; 修改表名: renametable表名to新表名; 示例: altertabletb_useraddqq_numvarchar(10) comment'QQ号码';altertabletb_user modify qq_numvarchar(11);altertabletb_user change qq_num qqvarchar(12) comment'QQ号码';altertabletb_userdropcolumnqq; ...
ALTER TABLEtasksCHANGE COLUMNtask_id INT(11) NOT NULL AUTO_INCREMENT; 47.2 新列添加到表 ALTER TABLE table_name ADD [COLUMN] column_name column_definition [FIRST|AFTER existing_column]; 首先,在ALTER TABLE子句后指定表名。 其次,将新列及其定义放在ADD COLUMN子句之后。请注意,COLUMN关键字是可选的,...
Updating an existingAUTO_INCREMENTcolumn value also resets theAUTO_INCREMENTsequence. You can retrieve the most recent automatically generatedAUTO_INCREMENTvalue with theLAST_INSERT_ID()SQL function or themysql_insert_id()C API function. These functions are connection-specific, so their return values ...