查询Sql Server Database中的唯一约束

with UniqueBasic as
(
	SELECT
	  tab.name AS TableName, -- 表名称
	  idx.name AS UniqueName, -- 唯一约束的名称
	  col.name AS UniqueFieldName -- 唯一约束的表字段
	FROM
	  sys.indexes idx
		JOIN sys.index_columns idxCol
		  ON (idx.object_id = idxCol.object_id
			  AND idx.index_id = idxCol.index_id
			  AND idx.is_unique_constraint = 1)
		JOIN sys.tables tab
		  ON (idx.object_id = tab.object_id)
		JOIN sys.columns col
		  ON (idx.object_id = col.object_id
			  AND idxCol.column_id = col.column_id)
) 
SELECT A.TableName,A.UniqueName,
(
	SELECT UniqueFieldName+',' FROM UniqueBasic t1 WHERE t1.UniqueName=A.UniqueName FOR XML PATH('')
) AS UniqueFieldNames
FROM UniqueBasic A 
WHERE A.UniqueName = 'Qywx_App_UniqueAgentId'
GROUP BY A.TableName,A.UniqueName

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