今天遇到的一个业务需求----纠结的查询

SELECT REPAIRBILLNO AS RepairNo,WishNO AS WishNO,WorkNO as WorkNO,Id AS Id,WORKITEMCODE AS JobNo,WORKITEMNAME AS JobName,REPAIRKFEE AS OutLay,WORKERNAME AS Executor1 INTO CAR_RT_RepairJob_New FROM 
(SELECT *,ROW_NUMBER() OVER(PARTITION BY REPAIRBILLNO,WishNO,WorkNo ORDER BY   REPAIRBILLNO) Id
       FROM (SELECT *,ROW_NUMBER() OVER(PARTITION BY REPAIRBILLNO,WishNO ORDER  BY REPAIRBILLNO) WorkNO
FROM (SELECT REPAIRBILLNO,ROW_NUMBER() OVER(PARTITION BY   REPAIRBILLNO,CUSTNOTICE ORDER BY REPAIRBILLNO)   WishNO,WORKITEMCODE,WORKITEMNAME,REPAIRKFEE,WORKERNAME FROM dbo.V_IT_INTERFACE_RF

WHERE MODIFYTIME >(SELECT CASE(ISNULL(MAX(UpdateDateTime),'')) WHEN '' THEN '' ELSE MAX(UpdateDateTime) END FROM CAR_RT_RepairJob)

)t
)tt
)ttt

 

    打完这纠结的一串SQL后，在Sqlserver2005执行，还好，效率并没有想象中的那么低。大概的需求是这样的：

将表A中的a、b、c、字段同步到(新增或更新)表B对应的字段中，但是B中有四个联合主键O、P、Q、M，当O相同时P依次加1，O、P相同时Q加1，依次类推.......   敲了下，还好，大致的思维，只是多了几层嵌套而已。