将 ID 定义为自增(AUTO_INCREMENT)属性,可以在添加新记录时自动生成一个唯一的 ID 数值。 创建表和设置 ID 以下是创建一个包含 ID 字段的简单用户表的 SQL 示例: CREATETABLEusers(idINTAUTO_INCREMENTPRIMARYKEY,usernameVARCHAR(50)NOTNULL,emailVARCHAR(100)NOTN
十三、SQL_AUTO_IS_NULL = {0 | 1} 如果此选项设置为1,最后插入的包含一个AUTO_INCREMENT 值的行可利用WHERE autoinccolIS NULL 形式的WHERE 子句来选择。如Access 这样的ODBC 程序使用此选项。此选项的缺省设置为1,它是在MySQL 3.23.5 中引入的。 SET SQL_AUTO_IS_NULL = 0 1....
I am using MySQL 5.1.58-community Edition. Here's how you can reproduce it. Step 1: Create database test; Step 2: use test; Step 3: CREATE TABLE `test`.`Book` (`BOOK_ID` INT AUTO_INCREMENT NOT NULL, `BOOK_NAME` VARCHAR(45) NOT NULL, CONSTRAINT `PK_BOOK` PRIMARY KEY (`BOOK_...
id int auto_increment primary key, hobby set('music','movie','swimming') ); -- 2、插入值 insert into set_table(hobby) values (1), (2), (3), (4), (5), (6), (7), ('music'), ('movie'), ('music,movie'), ('swimming'), ...
id INT PRIMARY KEY AUTO_INCREMENT,name VARCHAR(50),gender ENUM(‘男’, ‘女’),preferences SET(‘接受推送消息’, ‘接受邮件通知’, ‘公开个人资料’));在上面的SQL中，我们定义了一个名为users的表，包含了id、name、gender...
>CREATETABLEtest_ws_mgr.test ( idintprimarykey auto_increment, strvarchar(64)notnull); Query OK,1rowaffected (0.01sec) >INSERTINTOtest_ws_mgr.test(`str`)VALUES("a"); Query OK,1rowaffected (0.01sec) >INSERTINTOtest_ws_mgr.test(`str`)VALUES("b"); ...
How can set AUTO_INCREMENT initial value for primary key usingPomelo.EntityFrameworkCore.MySql?. like thishttps://stackoverflow.com/questions/1485668/how-to-set-initial-value-and-auto-increment-in-mysql CREATETABLEmy_table( idINTUNSIGNEDNOT NULLAUTO_INCREMENT, nameVARCHAR(100)NOT NULL,PRIMARY KEY...
CREATE TABLE users ( id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(255), role SET('admin', 'editor', 'viewer') ); 插入数据: 代码语言:txt 复制 INSERT INTO users (name, role) VALUES ('Alice', 'admin,editor'); INSERT INTO users (name, role) VALUES ('Bob', 'viewer'); ...
mysql字段set指定范围随机数值 mysql随机取数 一.初始化测试表 创建表 words CREATE TABLE `words` ( `id` int(11) NOT NULL AUTO_INCREMENT, `word` varchar(64) DEFAULT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB; 1. 插入测试数据 create procedure idata()begin declare i int;...
I am not able to make CachedRowSet's add a record to the database if I don't pass a value in for the Auto-Increment field. Platform: GlassFish v2 JDK v1.6 mysql Driver: 5.1.6 *** JAVA SOURCE *** public Booleansave(TeamBean teamBean) { CachedRow cachedRowSet = null...