Bug #25660CHECK constraints in Create Table Submitted:17 Jan 2007 1:45Modified:6 Nov 2009 17:12 Reporter:Sahaya ThivearajEmail Updates: Status:DuplicateImpact on me: None Category:MySQL Server: GeneralSeverity:S3 (Non-critical) Version:server version: 5.0.27-communityOS:Windows (Windows XP) ...
CREATE TABLE users ( id INT PRIMARY KEY, name VARCHAR(50), age INT CHECK (age BETWEEN 18 AND 100) ); 或者,如果你已经创建了表,也可以使用ALTER TABLE来添加CHECK约束: 代码语言:txt 复制 ALTER TABLE users ADD CONSTRAINT chk_age CHECK (age BETWEEN 18 AND 100); ...
CREATE TABLE users ( id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(50) NOT NULL, age INT CHECK (age >= 0 AND age <= 120), gender ENUM('男', '女') CHECK (gender IN ('男', '女')) ); 在这个示例中,我们创建了一个名为users的表,其中包含id、name、age和gender四个字段。对于age...
CREATE TABLE [dbo].[TableDates] ( dates DateTime ) 在**“文件”菜单上,单击“保存 TableDates.table.sql”**。 在准备好表后,您将添加 CHECK 约束以验证使用的日期范围是否有效。 提示 您将在另一个过程中为自定义 DateRanges 数据生成器的属性值输入相应的日期范围。 有关更多信息,请参见创建和配置...
【mysql】关于命令SHOW CREATE TABLE <表名\G>报错问题:1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '/G' at line 1 1、首先该命令是用来查看表的详细信息...
CREATE TABLE test=# insert into tbl_null (a,b) values(1,'1'); INSERT 0 1 test=# insert into tbl_null (a) values(2); INSERT 0 1 test=# insert into tbl_null (b) values('3'); ERROR: null value in column "a" violates not-null constraint ...
table student2drop constraint (约束名)删除约束的语法如下：Alter Table 表名Drop Constraint 约束名...
KERNEL_SECURITY_CHECK_FAILURE 错误检查的值为 0x00000139。 此错误检查指示内核检测到关键数据结构的损坏。 重要 这篇文章适合程序员阅读。 如果你是在使用计算机时收到蓝屏错误代码的客户,请参阅蓝屏错误疑难解答。 错误检查 0x139 KERNEL_SECURITY_CHECK_FAILURE 参数 ...
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All storage engines do not necessarily support all four maintenance operations. In such cases, an error message is displayed. For example, iftest.tis anMEMORYtable, an attempt to check it produces this result: $>mysqlchecktest t test.t note:The storage engine for the table doesn't support ...