请告诉我如何在SQL Server 2005中获取主键名称

Question

我需要一个表的主键名和主键列名，请告诉我应该写什么查询。

Answer 1

declare @tableName as nvarchar(100)
set @tableName = 'table'

select i.name, c.name 
from sys.index_columns ic 
    join sys.indexes i on ic.index_id=i.index_id
    join sys.columns c on c.column_id=ic.column_id
where 
    i.[object_id] = object_id(@tableName) and 
    ic.[object_id] = object_id(@tableName) and 
    c.[object_id] = object_id(@tableName) and
    is_primary_key = 1

Answer 2

这是另一个使用INFORMATION_SCHEMA视图的选项

SELECT 
    cu.Table_Catalog,
    cu.Table_Schema,
    cu.table_name,
    cu.Constraint_name  ,
    cu.column_name

FROM 
    sys.indexes si
    inner join  INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE cu
    on si.name = cu.constraint_name
WHERE 
    is_primary_key = 1

Answer 3

并不是您要找的东西，但是您可以尝试一下：

SQL 2000：T-SQL获取表的外键关系

Answer 4

只是一个性能说明-使用sys表的选择比使用INFORMATION_SCHEMA视图的选择要快几个数量级