SQL SERVER获取信息的方法

Posted 2020-09-28 a14907

获取数据库的表

SELECT
obj.name tablename,
schem.name schemname,
CAST
(
    CASE 
        WHEN (SELECT COUNT(1) FROM sys.indexes WHERE object_id= obj.OBJECT_ID AND is_primary_key=1) >=1 THEN 1
        ELSE 0
    END 
AS BIT) HasPrimaryKey                                         
from sys.objects obj 
inner join dbo.sysindexes idx on obj.object_id=idx.id and idx.indid<=1
INNER JOIN sys.schemas schem ON obj.schema_id=schem.schema_id
where type=‘U‘ and obj.name =‘表名‘
order by obj.name

 

获取表的字段名及类型

1、方法一

SELECT * FROM INFORMATION_SCHEMA.columns WHERE TABLE_NAME=‘表名‘ 

2、方法二

select a.name tablename, b.name colName, c.name colType ,c.length colLength

from sysobjects a inner join syscolumns b
on a.id=b.id and a.xtype=‘U‘
inner join systypes c
on b.xtype=c.xusertype

where a.name=‘表名‘

 规律：

表信息存储在：sys.objects

架构信息在：sys.schemas

索引信息在：sys.indexes

列信息在：sys.columns

这四个都是视图。