SQL 语句查看表结构

set statistics io on


SQL 语句查看表结构

exec sp_help ‘表名’
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怎样在sql sever中用sql命令查看表结构？
可以使用内置的存储过程sp_MShelpcolumns。
如查询表B_RWZL的结构：
sp_MShelpcolumns 'dbo.B_RWZL'
=====================================
（1）
SELECT
表名=case when a.colorder=1 then https://www.360docs.net/doc/5914289576.html, else '' end,
表说明=case when a.colorder=1 then isnull(f.value,'') else '' end,
字段序号=a.colorder,
字段名=https://www.360docs.net/doc/5914289576.html,,
标识=case when COLUMNPROPERTY( a.id,https://www.360docs.net/doc/5914289576.html,,'IsIdentity')=1 then '√'else '' end,
主键=case when exists(SELECT 1 FROM sysobjects where xtype='PK' and parent_obj=a.id and name in (
SELECT name FROM sysindexes WHERE indid in(
SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid
))) then '√' else '' end,
类型=https://www.360docs.net/doc/5914289576.html,,
占用字节数=a.length,
长度=COLUMNPROPERTY(a.id,https://www.360docs.net/doc/5914289576.html,,'PRECISION'),
小数位数=isnull(COLUMNPROPERTY(a.id,https://www.360docs.net/doc/5914289576.html,,'Scale'),0),
允许空=case when a.isnullable=1 then '√'else '' end,
默认值=isnull(e.text,''),
字段说明=isnull(g.[value],'')
FROM syscolumns a
left join systypes b on a.xusertype=b.xusertype
inner join sysobjects d on a.id=d.id and d.xtype='U' and https://www.360docs.net/doc/5914289576.html,<>'dtproperties'
left join syscomments e on a.cdefault=e.id
left join sysproperties g on a.id=g.id and a.colid=g.smallid
left join sysproperties f on d.id=f.id and f.smallid=0
--where https://www.360docs.net/doc/5914289576.html,='要查询的表' --如果只查询指定表,加上此条件
order by a.id,a.colorder

（2）

SQL2000系统表的应用
--1：获取当前数据库中的所有用户表

select Name from sysobjects where xtype='u' and status>=0

--2：获取某一个表的所有字段

select name from syscolumns where id=object_id('表名')

--3：查看与某一个表相关的视图、存储过程、函数

select a.* from sysobjects a, syscomments b where a.id = b.id and b.text like '%表名%'

--4：查看当前数据库中所有存储过程

select name as 存储过程名称 from sysobjects where xtype='P'

--5：查询用户创建的所有数据库

select * from master..sysdatabases D where sid not in(select sid from master..syslogins where name='sa')

或者

select dbid, name AS DB_NAME from master..sysdatabases where sid <> 0x01

--6：查询某一个表的字段和数据类型

select column_name,data_type,CHARACTER_MAXIMUM_LENGTH,CHARACTER_OCTET_LENGTH,NUMERIC_PRECISION,NUMERIC_PRECISION_RADIX,NUMERIC_SCALE from information_schema.columns where table_name = '表名'

---查询列用逗号分开
select column_name+' '+data_type+(case when ISNULL(CHARACTER_MAXIMUM_LENGTH,'')!='' then '('+cast(CHARACTER_MAXIMUM_LENGTH as nvarchar(20))+')' else '' end)+',' from #TEST as b for xml path('')


--7:取得表字段的描述
select name,
(select value from sysproperties where id = syscolumns.id and smallid=syscolumns.colid) as 描述
from syscolumns where id=object_id('表名')

排行 partition by code,colorid
SELECT 姓名,成绩,
ROW_NUMBER() OVER(ORDER BY 成绩 DESC) AS [ROW_NUMBER],
RANK() OVER(ORDER BY 成绩 DESC) AS [RANK],
DENSE_RANK() OVER(ORDER BY 成绩 DESC) AS [DENSE_RANK],
NTILE(6) OVER(ORDER BY 成绩 DESC) AS [NTILE]
FROM @table

select * from sys.sql_modules where definition like '%CheckDate%'