问题提出
先造一些测试数据以说明题目:
DECLARE @TestData TABLE(ID INT,Col1 VARCHAR(20),Col2 VARCHAR(20)) INSERT INTO @TestData(ID,Col1,Col2) SELECT 1,'New','Approved' UNION ALL SELECT 2,'Approved','Commited' UNION ALL SELECT 3,'Commited','In Progress' UNION ALL SELECT 4,'New','Approved' UNION ALL SELECT 5,'New','Approved' UNION ALL SELECT 6,'New','Approved' UNION ALL SELECT 7,'Approved','Removed' SELECT * FROM @TestData
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