Hi All,I am trying to merge two views data into single table. Each view also created by subqueries. I am getting "Internal SQL Server Error". Is there anyone has idea what is wrong ? When I run individual it is running fine.SELECT Y.TotalTestCases, Y.PassedCases, Y.FailedCases, Z.TotalRequirements, Z.Requirementswithcoverage, Z.RequirementswithnocoverageFROM (Select F.Requirements, Count(F.TestName)AS 'TotalTestCases', COUNT(CASE WHEN F.STATUS = 'Passed' Then F.STATUS END) AS "PassedCases", COUNT(CASE WHEN F.STATUS = 'Failed' Then F.STATUS END) AS "FailedCases", COUNT(CASE WHEN F.STATUS = 'NoRun' Then F.STATUS END) AS "NoRunCases", COUNT(CASE WHEN F.STATUS = 'NotCompleted' Then F.STATUS END) AS "NotCompletedCases", COUNT(CASE WHEN F.STATUS = 'N/A' Then F.STATUS END) AS "NACases",Round ( Count(Case when F.STATUS = 'Passed' Then F.STATUS End) * 100/ CAST ( Count(F.TestName) AS float(2)) , 1) AS '%Passed',Round ( Count(Case when F.STATUS = 'Failed' Then F.STATUS End) * 100/ CAST ( Count(F.TestName) AS float(2)) , 1) AS '%Failed'From ( Select Distinct T.TS_NAME AS "TestName", T.STATUS, T.RequirementsFrom ( SELECT TEST.TS_NAME, REQ.RQ_REQ_PATH, TEST.TS_EXEC_STATUS AS STATUS , Requirements = Case WHEN RQ_REQ_PATH Like 'AAAAADAARAADAAC%' Then 'Medicare' WHEN RQ_REQ_PATH Like 'AAAAADAALAAN%' THEN 'MHSA' Else 'Unknown' END FROM TEST, REQ_COVER, REQ WHERE TEST.TS_TEST_ID = REQ_COVER.RC_ENTITY_ID AND REQ.RQ_REQ_ID = REQ_COVER.RC_REQ_ID ) T ) F WHERE Requirements <> 'Unknown' Group by Requirements) Y , (SELECT Requirements, Count(P.Requirements) As 'TotalRequirements',Count(case when P.TestCoverage > 0 Then P.TestCoverage End) As 'Requirementswithcoverage' , Count(case when P.TestCoverage = 0 Then P.TestCoverage End) As 'Requirementswithnocoverage' , Sum(P.TestCaseValidated) AS 'Test Case validated' FROM ( SELECT REQ.RQ_REQ_ID, REQ.RQ_REQ_NAME, COUNT(REQ_COVER.RC_ITEM_ID) AS TestCoverage , (SELECT COUNT(CASE WHEN TEST.TS_USER_24 <> '' Then TEST.TS_USER_24 END) FROM TEST, REQ_COVER WHERE REQ_COVER.RC_ENTITY_ID = TEST.TS_TEST_ID AND REQ.RQ_REQ_ID = REQ_COVER.RC_REQ_ID )AS TestCaseValidated,Requirements = Case WHEN RQ_REQ_PATH Like 'AAAAADAARAADAAC%' Then 'Medicare' WHEN RQ_REQ_PATH Like 'AAAAADAALAAN%' THEN 'MHSA' Else 'Unknown' END FROM REQ LEFT JOIN REQ_COVER ON REQ.RQ_REQ_ID = REQ_COVER.RC_REQ_ID WHERE REQ.RQ_TYPE_ID IN (3,4)GROUP BY REQ.RQ_REQ_NAME, REQ.RQ_REQ_ID, REQ.RQ_REQ_PATH, REQ.RQ_REQ_AUTHOR) P WHERE Requirements <> 'Unknown' Group by Requirements ) ZWHERE Y.Requirements = Z.Requirements