MySQL 和SQLserver 创建表注释字段的差别

文章目录

• mysql 的例子
• sqlserver 的例子

DROP TABLE IF EXISTS `department`;
CREATE TABLE `department` (
  `DepartmentID` char(3) NOT NULL COMMENT '员工部门号，主键',
  `DepartmentName` char(20) NOT NULL COMMENT '部门号',
  `Note` text COMMENT '备注',
  PRIMARY KEY (`DepartmentID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

sqlserver 的例子

CREATE TABLE [dbo].[Department](
	[DepartmentID] [char](3) NOT NULL,
	[DepartmentName] [char](20) NOT NULL,
	[Note] [text] NULL,
 CONSTRAINT [PK_Department] PRIMARY KEY CLUSTERED 
(
	[DepartmentID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'员工部门号，主键' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'Department', @level2type=N'COLUMN',@level2name=N'DepartmentID'
GO
EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'部门名' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'Department', @level2type=N'COLUMN',@level2name=N'DepartmentName'
GO
EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'备注' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'Department', @level2type=N'COLUMN',@level2name=N'Note'
GO

** 可以看出，，MySQL 比SQLserver 更加的方便去注释，，**