探讨SQL利用INFORMATION_SCHEMA系统视图如何获取表的
网络编程 2021-07-05 15:27www.168986.cn编程入门
本篇文章是对SQL利用INFORMATION_SCHEMA系统视图如何获取表的主外键信息进行了详细的分析介绍,需要的朋友参考下
接着上篇文章《》里面提到了INFORMATION_SCHEMA视图,其实到了SQL 2005微软都主推大家使用INFORMATION_SCHEMA系统视图,而不是在使用sys东东了,目前还是有许多信息只能通过sys视图来查询。这里我们还是以查询表结果信息为例来说明一些主要的INFORMATION_SCHEMA视图的使用。
我们需要查询列的信息,这需要用到[INFORMATION_SCHEMA].[COLUMNS]系统视图来查询数据列的信息,SQL 如下
SELECT c.TABLE_SCHEMA ,
c.TABLE_NAME ,
c.COLUMN_NAME ,
c.DATA_TYPE ,
c.CHARACTER_MAXIMUM_LENGTH ,
c.COLUMN_DEFAULT ,
c.IS_NULLABLE ,
c.NUMERIC_PRECISION ,
c.NUMERIC_SCALE
FROM [INFORMATION_SCHEMA].[COLUMNS] c
WHERE TABLE_NAME = 'Address'
运行结果如下
我们都知道我们在定义列的时候一般的使用都是varchar(50)之类的信息,这里我们需要整合DATA_TYPE和CHARACTER_MAXIMUM_LENGTH信息,当CHARACTER_MAXIMUM_LENGTH为-1时即使说没有指定具体最大长度,数据的指定长度信息是max,而numeric需要整合NUMERIC_PRECISION、NUMERIC_SCALE信息。修改后的SQL如下
SELECT c.TABLE_SCHEMA ,
c.TABLE_NAME ,
c.COLUMN_NAME ,
CASE WHEN ( ( CHARINDEX('char', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH <> -1
)
THEN c.DATA_TYPE + '('
+ CAST(c.CHARACTER_MAXIMUM_LENGTH AS VARCHAR(4)) + ')'
WHEN ( ( CHARINDEX('CHAR', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH = -1
) THEN c.DATA_TYPE + '(max)'
WHEN ( CHARINDEX('numeric', c.DATA_TYPE) > 0 )
THEN c.DATA_TYPE + '(' + CAST(c.NUMERIC_PRECISION AS VARCHAR(4))
+ ',' + CAST(c.NUMERIC_SCALE AS VARCHAR(4)) + ')'
ELSE c.DATA_TYPE
END AS DATA_TYPE ,
c.COLUMN_DEFAULT ,
c.IS_NULLABLE ,
c.COLUMN_DEFAULT
FROM [INFORMATION_SCHEMA].[COLUMNS] c
WHERE TABLE_NAME = 'Address'
ORDER BY c.ORDINAL_POSITION
运行结果如图
现在我们需要标记这张表的那些列是主键,那些列是外键,要查询表的主、外键信息需要用到[INFORMATION_SCHEMA].[TABLE_CONSTRAINTS]和[INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] 系统视图
运行结果如图
修改我们先前的SQL语句
SELECT c.TABLE_SCHEMA ,
c.TABLE_NAME ,
c.COLUMN_NAME ,
CASE WHEN ( ( CHARINDEX('char', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH <> -1
)
THEN c.DATA_TYPE + '('
+ CAST(c.CHARACTER_MAXIMUM_LENGTH AS VARCHAR(4)) + ')'
WHEN ( ( CHARINDEX('CHAR', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH = -1
) THEN c.DATA_TYPE + '(max)'
WHEN ( CHARINDEX('numeric', c.DATA_TYPE) > 0 )
THEN c.DATA_TYPE + '(' + CAST(c.NUMERIC_PRECISION AS VARCHAR(4))
+ ',' + CAST(c.NUMERIC_SCALE AS VARCHAR(4)) + ')'
ELSE c.DATA_TYPE
END AS DATA_TYPE ,
c.COLUMN_DEFAULT ,
c.IS_NULLABLE ,
c.COLUMN_DEFAULT ,
CASE WHEN tc.CONSTRAINT_TYPE = 'PRIMARY KEY' THEN 'YES'
ELSE 'NO'
END AS IS_PRIMARY_KEY ,
CASE WHEN tc.CONSTRAINT_TYPE = 'FOREIGN KEY' THEN 'YES'
ELSE 'NO'
END AS IS_FOREIGN_KEY
FROM [INFORMATION_SCHEMA].[COLUMNS] c
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] kcu ON kcu.TABLE_SCHEMA = c.TABLE_SCHEMA
AND kcu.TABLE_NAME = c.TABLE_NAME
AND kcu.COLUMN_NAME = c.COLUMN_NAME
LEFT JOIN [INFORMATION_SCHEMA].[TABLE_CONSTRAINTS] tc ON tc.CONSTRAINT_SCHEMA = kcu.CONSTRAINT_SCHEMA
AND tc.CONSTRAINT_NAME = kcu.CONSTRAINT_NAME
WHERE c.TABLE_NAME = 'Address'
ORDER BY c.ORDINAL_POSITION
运行结果如图
现在我们已经知道那些列是主键那些是外键,接下来的就是外键列所关联的外检表信息,这里需要用到[INFORMATION_SCHEMA].[REFERENTIAL_CONSTRAINTS]系统视图,运行该视图如下
所以修改我们的SQL如下
SELECT c.TABLE_SCHEMA ,
c.TABLE_NAME ,
c.COLUMN_NAME ,
CASE WHEN ( ( CHARINDEX('char', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH <> -1
)
THEN c.DATA_TYPE + '('
+ CAST(c.CHARACTER_MAXIMUM_LENGTH AS VARCHAR(4)) + ')'
WHEN ( ( CHARINDEX('CHAR', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH = -1
) THEN c.DATA_TYPE + '(max)'
WHEN ( CHARINDEX('numeric', c.DATA_TYPE) > 0 )
THEN c.DATA_TYPE + '(' + CAST(c.NUMERIC_PRECISION AS VARCHAR(4))
+ ',' + CAST(c.NUMERIC_SCALE AS VARCHAR(4)) + ')'
ELSE c.DATA_TYPE
END AS DATA_TYPE ,
c.COLUMN_DEFAULT ,
c.IS_NULLABLE ,
c.COLUMN_DEFAULT ,
CASE WHEN tc.CONSTRAINT_TYPE = 'PRIMARY KEY' THEN 'YES'
ELSE 'NO'
END AS IS_PRIMARY_KEY ,
CASE WHEN tc.CONSTRAINT_TYPE = 'FOREIGN KEY' THEN 'YES'
ELSE 'NO'
END AS IS_FOREIGN_KEY,
fkcu.COLUMN_NAME AS FOREIGN_KEY,
fkcu.TABLE_NAME AS FOREIGN_TABLE
FROM [INFORMATION_SCHEMA].[COLUMNS] c
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] kcu ON kcu.TABLE_SCHEMA = c.TABLE_SCHEMA
AND kcu.TABLE_NAME = c.TABLE_NAME
AND kcu.COLUMN_NAME = c.COLUMN_NAME
LEFT JOIN [INFORMATION_SCHEMA].[TABLE_CONSTRAINTS] tc ON tc.CONSTRAINT_SCHEMA = kcu.CONSTRAINT_SCHEMA
AND tc.CONSTRAINT_NAME = kcu.CONSTRAINT_NAME
LEFT JOIN [INFORMATION_SCHEMA].[REFERENTIAL_CONSTRAINTS] fc ON kcu.CONSTRAINT_SCHEMA = fc.CONSTRAINT_SCHEMA
AND kcu.CONSTRAINT_NAME = fc.CONSTRAINT_NAME
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] fkcu ON fkcu.CONSTRAINT_SCHEMA = fc.UNIQUE_CONSTRAINT_SCHEMA
AND fkcu.CONSTRAINT_NAME = fc.UNIQUE_CONSTRAINT_NAME
WHERE c.TABLE_NAME = 'Address'
ORDER BY c.ORDINAL_POSITION
运行结果如图
我们的查询结果中显示了太多的NULL,看着不怎么舒服,还有我们的表名应该显示一次就可以,修改SQL如下
SELECT CASE WHEN c.ORDINAL_POSITION = 1
THEN c.TABLE_SCHEMA + '.' + c.TABLE_NAME
ELSE ''
END AS TABLE_NAME ,
c.COLUMN_NAME ,
CASE WHEN ( ( CHARINDEX('char', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH <> -1
)
THEN c.DATA_TYPE + '('
+ CAST(c.CHARACTER_MAXIMUM_LENGTH AS VARCHAR(4)) + ')'
WHEN ( ( CHARINDEX('CHAR', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH = -1
) THEN c.DATA_TYPE + '(max)'
WHEN ( CHARINDEX('numeric', c.DATA_TYPE) > 0 )
THEN c.DATA_TYPE + '(' + CAST(c.NUMERIC_PRECISION AS VARCHAR(4))
+ ',' + CAST(c.NUMERIC_SCALE AS VARCHAR(4)) + ')'
ELSE c.DATA_TYPE
END AS DATA_TYPE ,
ISNULL(c.COLUMN_DEFAULT, '') AS COLUMN_DEFAULT ,
CASE WHEN c.IS_NULLABLE = 'YES' THEN '√'
ELSE ''
END IS_NULLABLE ,
CASE WHEN tc.CONSTRAINT_TYPE = 'PRIMARY KEY' THEN '√'
ELSE ''
END AS IS_PRIMARY_KEY ,
CASE WHEN tc.CONSTRAINT_TYPE = 'FOREIGN KEY' THEN '√'
ELSE ''
END AS IS_FOREIGN_KEY ,
ISNULL(fkcu.COLUMN_NAME, '') AS FOREIGN_KEY ,
ISNULL(fkcu.TABLE_NAME, '') AS FOREIGN_TABLE
FROM [INFORMATION_SCHEMA].[COLUMNS] c
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] kcu ON kcu.TABLE_SCHEMA = c.TABLE_SCHEMA
AND kcu.TABLE_NAME = c.TABLE_NAME
AND kcu.COLUMN_NAME = c.COLUMN_NAME
LEFT JOIN [INFORMATION_SCHEMA].[TABLE_CONSTRAINTS] tc ON tc.CONSTRAINT_SCHEMA = kcu.CONSTRAINT_SCHEMA
AND tc.CONSTRAINT_NAME = kcu.CONSTRAINT_NAME
LEFT JOIN [INFORMATION_SCHEMA].[REFERENTIAL_CONSTRAINTS] fc ON kcu.CONSTRAINT_SCHEMA = fc.CONSTRAINT_SCHEMA
AND kcu.CONSTRAINT_NAME = fc.CONSTRAINT_NAME
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] fkcu ON fkcu.CONSTRAINT_SCHEMA = fc.UNIQUE_CONSTRAINT_SCHEMA
AND fkcu.CONSTRAINT_NAME = fc.UNIQUE_CONSTRAINT_NAME
WHERE c.TABLE_NAME = 'Address'
ORDER BY c.ORDINAL_POSITION
运行结果如图
有不对的地方还请大家拍砖!
我们需要查询列的信息,这需要用到[INFORMATION_SCHEMA].[COLUMNS]系统视图来查询数据列的信息,SQL 如下
代码如下:
SELECT c.TABLE_SCHEMA ,
c.TABLE_NAME ,
c.COLUMN_NAME ,
c.DATA_TYPE ,
c.CHARACTER_MAXIMUM_LENGTH ,
c.COLUMN_DEFAULT ,
c.IS_NULLABLE ,
c.NUMERIC_PRECISION ,
c.NUMERIC_SCALE
FROM [INFORMATION_SCHEMA].[COLUMNS] c
WHERE TABLE_NAME = 'Address'
运行结果如下
我们都知道我们在定义列的时候一般的使用都是varchar(50)之类的信息,这里我们需要整合DATA_TYPE和CHARACTER_MAXIMUM_LENGTH信息,当CHARACTER_MAXIMUM_LENGTH为-1时即使说没有指定具体最大长度,数据的指定长度信息是max,而numeric需要整合NUMERIC_PRECISION、NUMERIC_SCALE信息。修改后的SQL如下
代码如下:
SELECT c.TABLE_SCHEMA ,
c.TABLE_NAME ,
c.COLUMN_NAME ,
CASE WHEN ( ( CHARINDEX('char', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH <> -1
)
THEN c.DATA_TYPE + '('
+ CAST(c.CHARACTER_MAXIMUM_LENGTH AS VARCHAR(4)) + ')'
WHEN ( ( CHARINDEX('CHAR', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH = -1
) THEN c.DATA_TYPE + '(max)'
WHEN ( CHARINDEX('numeric', c.DATA_TYPE) > 0 )
THEN c.DATA_TYPE + '(' + CAST(c.NUMERIC_PRECISION AS VARCHAR(4))
+ ',' + CAST(c.NUMERIC_SCALE AS VARCHAR(4)) + ')'
ELSE c.DATA_TYPE
END AS DATA_TYPE ,
c.COLUMN_DEFAULT ,
c.IS_NULLABLE ,
c.COLUMN_DEFAULT
FROM [INFORMATION_SCHEMA].[COLUMNS] c
WHERE TABLE_NAME = 'Address'
ORDER BY c.ORDINAL_POSITION
运行结果如图
现在我们需要标记这张表的那些列是主键,那些列是外键,要查询表的主、外键信息需要用到[INFORMATION_SCHEMA].[TABLE_CONSTRAINTS]和[INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] 系统视图
运行结果如图
修改我们先前的SQL语句
代码如下:
SELECT c.TABLE_SCHEMA ,
c.TABLE_NAME ,
c.COLUMN_NAME ,
CASE WHEN ( ( CHARINDEX('char', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH <> -1
)
THEN c.DATA_TYPE + '('
+ CAST(c.CHARACTER_MAXIMUM_LENGTH AS VARCHAR(4)) + ')'
WHEN ( ( CHARINDEX('CHAR', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH = -1
) THEN c.DATA_TYPE + '(max)'
WHEN ( CHARINDEX('numeric', c.DATA_TYPE) > 0 )
THEN c.DATA_TYPE + '(' + CAST(c.NUMERIC_PRECISION AS VARCHAR(4))
+ ',' + CAST(c.NUMERIC_SCALE AS VARCHAR(4)) + ')'
ELSE c.DATA_TYPE
END AS DATA_TYPE ,
c.COLUMN_DEFAULT ,
c.IS_NULLABLE ,
c.COLUMN_DEFAULT ,
CASE WHEN tc.CONSTRAINT_TYPE = 'PRIMARY KEY' THEN 'YES'
ELSE 'NO'
END AS IS_PRIMARY_KEY ,
CASE WHEN tc.CONSTRAINT_TYPE = 'FOREIGN KEY' THEN 'YES'
ELSE 'NO'
END AS IS_FOREIGN_KEY
FROM [INFORMATION_SCHEMA].[COLUMNS] c
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] kcu ON kcu.TABLE_SCHEMA = c.TABLE_SCHEMA
AND kcu.TABLE_NAME = c.TABLE_NAME
AND kcu.COLUMN_NAME = c.COLUMN_NAME
LEFT JOIN [INFORMATION_SCHEMA].[TABLE_CONSTRAINTS] tc ON tc.CONSTRAINT_SCHEMA = kcu.CONSTRAINT_SCHEMA
AND tc.CONSTRAINT_NAME = kcu.CONSTRAINT_NAME
WHERE c.TABLE_NAME = 'Address'
ORDER BY c.ORDINAL_POSITION
运行结果如图
现在我们已经知道那些列是主键那些是外键,接下来的就是外键列所关联的外检表信息,这里需要用到[INFORMATION_SCHEMA].[REFERENTIAL_CONSTRAINTS]系统视图,运行该视图如下
所以修改我们的SQL如下
代码如下:
SELECT c.TABLE_SCHEMA ,
c.TABLE_NAME ,
c.COLUMN_NAME ,
CASE WHEN ( ( CHARINDEX('char', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH <> -1
)
THEN c.DATA_TYPE + '('
+ CAST(c.CHARACTER_MAXIMUM_LENGTH AS VARCHAR(4)) + ')'
WHEN ( ( CHARINDEX('CHAR', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH = -1
) THEN c.DATA_TYPE + '(max)'
WHEN ( CHARINDEX('numeric', c.DATA_TYPE) > 0 )
THEN c.DATA_TYPE + '(' + CAST(c.NUMERIC_PRECISION AS VARCHAR(4))
+ ',' + CAST(c.NUMERIC_SCALE AS VARCHAR(4)) + ')'
ELSE c.DATA_TYPE
END AS DATA_TYPE ,
c.COLUMN_DEFAULT ,
c.IS_NULLABLE ,
c.COLUMN_DEFAULT ,
CASE WHEN tc.CONSTRAINT_TYPE = 'PRIMARY KEY' THEN 'YES'
ELSE 'NO'
END AS IS_PRIMARY_KEY ,
CASE WHEN tc.CONSTRAINT_TYPE = 'FOREIGN KEY' THEN 'YES'
ELSE 'NO'
END AS IS_FOREIGN_KEY,
fkcu.COLUMN_NAME AS FOREIGN_KEY,
fkcu.TABLE_NAME AS FOREIGN_TABLE
FROM [INFORMATION_SCHEMA].[COLUMNS] c
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] kcu ON kcu.TABLE_SCHEMA = c.TABLE_SCHEMA
AND kcu.TABLE_NAME = c.TABLE_NAME
AND kcu.COLUMN_NAME = c.COLUMN_NAME
LEFT JOIN [INFORMATION_SCHEMA].[TABLE_CONSTRAINTS] tc ON tc.CONSTRAINT_SCHEMA = kcu.CONSTRAINT_SCHEMA
AND tc.CONSTRAINT_NAME = kcu.CONSTRAINT_NAME
LEFT JOIN [INFORMATION_SCHEMA].[REFERENTIAL_CONSTRAINTS] fc ON kcu.CONSTRAINT_SCHEMA = fc.CONSTRAINT_SCHEMA
AND kcu.CONSTRAINT_NAME = fc.CONSTRAINT_NAME
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] fkcu ON fkcu.CONSTRAINT_SCHEMA = fc.UNIQUE_CONSTRAINT_SCHEMA
AND fkcu.CONSTRAINT_NAME = fc.UNIQUE_CONSTRAINT_NAME
WHERE c.TABLE_NAME = 'Address'
ORDER BY c.ORDINAL_POSITION
运行结果如图
我们的查询结果中显示了太多的NULL,看着不怎么舒服,还有我们的表名应该显示一次就可以,修改SQL如下
代码如下:
SELECT CASE WHEN c.ORDINAL_POSITION = 1
THEN c.TABLE_SCHEMA + '.' + c.TABLE_NAME
ELSE ''
END AS TABLE_NAME ,
c.COLUMN_NAME ,
CASE WHEN ( ( CHARINDEX('char', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH <> -1
)
THEN c.DATA_TYPE + '('
+ CAST(c.CHARACTER_MAXIMUM_LENGTH AS VARCHAR(4)) + ')'
WHEN ( ( CHARINDEX('CHAR', c.DATA_TYPE) > 0
OR CHARINDEX('binary', c.DATA_TYPE) > 0
)
AND c.CHARACTER_MAXIMUM_LENGTH = -1
) THEN c.DATA_TYPE + '(max)'
WHEN ( CHARINDEX('numeric', c.DATA_TYPE) > 0 )
THEN c.DATA_TYPE + '(' + CAST(c.NUMERIC_PRECISION AS VARCHAR(4))
+ ',' + CAST(c.NUMERIC_SCALE AS VARCHAR(4)) + ')'
ELSE c.DATA_TYPE
END AS DATA_TYPE ,
ISNULL(c.COLUMN_DEFAULT, '') AS COLUMN_DEFAULT ,
CASE WHEN c.IS_NULLABLE = 'YES' THEN '√'
ELSE ''
END IS_NULLABLE ,
CASE WHEN tc.CONSTRAINT_TYPE = 'PRIMARY KEY' THEN '√'
ELSE ''
END AS IS_PRIMARY_KEY ,
CASE WHEN tc.CONSTRAINT_TYPE = 'FOREIGN KEY' THEN '√'
ELSE ''
END AS IS_FOREIGN_KEY ,
ISNULL(fkcu.COLUMN_NAME, '') AS FOREIGN_KEY ,
ISNULL(fkcu.TABLE_NAME, '') AS FOREIGN_TABLE
FROM [INFORMATION_SCHEMA].[COLUMNS] c
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] kcu ON kcu.TABLE_SCHEMA = c.TABLE_SCHEMA
AND kcu.TABLE_NAME = c.TABLE_NAME
AND kcu.COLUMN_NAME = c.COLUMN_NAME
LEFT JOIN [INFORMATION_SCHEMA].[TABLE_CONSTRAINTS] tc ON tc.CONSTRAINT_SCHEMA = kcu.CONSTRAINT_SCHEMA
AND tc.CONSTRAINT_NAME = kcu.CONSTRAINT_NAME
LEFT JOIN [INFORMATION_SCHEMA].[REFERENTIAL_CONSTRAINTS] fc ON kcu.CONSTRAINT_SCHEMA = fc.CONSTRAINT_SCHEMA
AND kcu.CONSTRAINT_NAME = fc.CONSTRAINT_NAME
LEFT JOIN [INFORMATION_SCHEMA].[KEY_COLUMN_USAGE] fkcu ON fkcu.CONSTRAINT_SCHEMA = fc.UNIQUE_CONSTRAINT_SCHEMA
AND fkcu.CONSTRAINT_NAME = fc.UNIQUE_CONSTRAINT_NAME
WHERE c.TABLE_NAME = 'Address'
ORDER BY c.ORDINAL_POSITION
运行结果如图
有不对的地方还请大家拍砖!
上一篇:基于mysq字段选择的详解
下一篇:解析SQL 表结构信息查询 含主外键、自增长
编程语言
- 甘肃哪有关键词排名优化购买方式有哪些
- 甘肃SEO如何做网站优化
- 河南seo关键词优化怎么做电话营销
- 北京SEO优化如何做QQ群营销
- 来宾百度关键词排名:提升您网站曝光率的关键
- 卢龙关键词优化:提升您网站排名的策略与技巧
- 山东网站优化的注意事项有哪些
- 四川整站优化怎样提升在搜索引擎中的排名
- 疏附整站优化:提升网站性能与用户体验的全新
- 海南seo主要做什么工作售后服务要做到哪些
- 荣昌百度网站优化:提升您网站的搜索引擎排名
- 河北seo网站排名关键词优化如何做SEO
- 江西优化关键词排名推广售后保障一般有哪些
- 古浪SEO优化:提升你的网站可见性
- 西藏网站排名优化怎么把网站排名在百度首页
- 如何提升阳东百度快照排名:详尽指南