In SQL Server we have a procedure called "" for adding comments to tables and columns. Following is the sample script: -- Adding a comment to a column Col1 for the table LangTest EXEC sys.sp_addextendedproperty@name=N'MS_Description',@value=N'hello col1' ,@level0type=N'SCHEMA',@lev...
COMMENT ON COLUMN statement adds a comment for a column in the table. Quick Example: -- Define a table CREATE TABLE location (city VARCHAR(90)); -- Add a comment for city column COMMENT ON COLUMN location.city IS 'This is the city name
我尝试了几个web开发框架,比如ZendFramework1/2、Yii、Rails、Django for Python、Spring+myBatis等等。它们中的大多数都附带了代码生成器,这减少了编写CRUD、表数据编辑和SQL迁移(等等)的负担。例如,Yii中的Gii、ROR上的迁移工具、用于myBatis的myBatis生成器、Django应用程序管理器等等。但我在ZF里没有找到...
我想要往 job 表中 insert 一条数据,报错如题。 原因:要插入 job 表的数据中外键列的值有问题,userId 字段的值在 user 表中找不到。 解决: 确保 job 表中要引用的外键值在 user 表中有对应数据就可以了。 “ you're adding a foreign key, you need to make sure that the data in the child tabl...
这是mysql本身的规定,和 语言特征, 只能对数据库中的表和字段进行comment, 不能对数据库本身进行注释 mysql中的enum枚举类型和set集合类型,是复合类型的变量, 是mysql对标准sql的扩展. 他们 都是以字符串的形式出现的 , 只是 在数据库内部存储时, 是作为整数类型来处理的。 本身的列举值是字符串型。
SQL Server Getting started with SQL Server Index 'xp_cmdshell' does not exist?? "Exception has been thrown by the target of an invocation" and "Rule 'Setup administrator' failed" when installing SQL server 2016 "Invalid Object Name dbo." "is not a recognized built-in function name" ...
How to add value of field in sql query Subscribe Get notified when there's activity on this post This question has been flagged 2Replies 4902Views Thayif kabir i want to check the value of jobsheet field with database. When i run my code it gives syntax errors ...
1.39 sql_containing_cte_name 包含了cte_name定义的公共表达式的SQL语句 1.40 table_comment 对表的描述,仅支持字符串类型 1.41 table_name 表名称,仅支持字符串类型,名称长度一般不能超过128个字节 1.42 table_properties 表的属性列表,以key=value的形式表示,key为property_name,value为property_value,列表中每组key...
To comment any selected statement in just one keystroke Press CTRL+* with NumLock enabled: Selected statement will be commented automatically. If you select acommentedstatement the same key combination will uncomment it. Regions in SQL Server Management Studio !
Description: When I can add the comment to index, Workbench give me error: ERROR 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 'ADD INDEX `CreatedBy` (`CreatedBy` ASC)' at line 3 SQL State...