Question

在SQL Server 2008中，我想获取主键跨越的列（列名）列表。

我试过了

SELECT * 
FROM sys.key_constraints 
LEFT JOIN sysconstraints ON (sys.key_constraints.object_id = sysconstraints.constid)
WHERE 
    type = 'PK' 
    AND parent_object_id = OBJECT_ID('dbo.permissioncache');

这将返回主键和其他一些值，但不返回PK列的完整列表。

我还要加入哪些其他表？

Answer 1

试试这种方式

INFORMATION_SCHEMA方法

SELECT TC.TABLE_NAME,
       COLUMN_NAME,
       TC.CONSTRAINT_NAME
FROM   INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
       INNER JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE cc
               ON cc.Constraint_Name = tc.Constraint_Name
                  AND cc.Table_Name = tc.Table_Name
WHERE  Constraint_Type = 'PRIMARY KEY'
       AND cc.Table_Name = 'Yourtable'

Sys选项，

SELECT t.name  AS TABLE_NAME,
       c.name  AS COLUMN_NAME,
       kc.name AS CONSTRAINT_NAME
FROM   sys.key_constraints AS kc
       JOIN sys.tables AS t
         ON t.object_id = kc.parent_object_id
       JOIN sys.index_columns AS ic
         ON ic.object_id = t.object_id
            AND ic.index_id = kc.unique_index_id
       JOIN sys.columns AS c
         ON c.object_id = t.object_id
            AND c.column_id = ic.column_id
WHERE  kc.type = 'PK'
       AND t.name = 'Yourtable'

Answer 2

SELECT Col.Column_Name 
from 
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS Tab 
    INNER JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE Col 
ON
    Col.Constraint_Name = Tab.Constraint_Name
    AND Col.Table_Name = Tab.Table_Name
 WHERE Constraint_Type = 'PRIMARY KEY'

如果您想获取数据库中所有主键列的列表，那么

USE myDB;   
GO

SELECT i.name AS IndexName, 
       OBJECT_NAME(ic.OBJECT_ID) AS TableName, 
       COL_NAME(ic.OBJECT_ID,ic.column_id) AS ColumnName
FROM sys.indexes AS i
INNER JOIN sys.index_columns AS ic ON i.OBJECT_ID = ic.OBJECT_ID
       AND i.index_id = ic.index_id
WHERE i.is_primary_key = 1

Answer 3

使用内连接而不是左外连接，如果使用左外连接，它将给出左表中的所有行。

获取PK的列列表

3 个答案: