寻找零件类别的存储过程

Question

我们有一个查找零件类别的存储过程。它们总是从历史上开始，但是我们现在有部分出现在S中，但没有出现在数据中。

我想查找M和S，所以在下面的程序中如何更改它以查找Where Left（CS_REF，1）='M'？

我不是程序员......

ALTER PROCEDURE [dbo].[CatTypes] AS
 SELECT LEFT(CS_REF,3) AS Cat
 FROM a_cstwh
 WHERE LEFT(CS_REF,1) = 'M'
 GROUP BY LEFT(CS_REF,3)
 ORDER BY LEFT(CS_REF,3)
 OPTION (HASH GROUP)

Answer 1

试试这个

SELECT LEFT(CS_REF,3) AS Cat
FROM a_cstwh
WHERE LEFT(CS_REF,1) IN ('M', 'S')
GROUP BY LEFT(CS_REF,3)
ORDER BY LEFT(CS_REF,3)
OPTION (HASH GROUP)

（OR）

SELECT LEFT(CS_REF,3) AS Cat
FROM a_cstwh
WHERE LEFT(CS_REF,1) = 'M' OR LEFT(CS_REF,1) =  'S'
GROUP BY LEFT(CS_REF,3)
ORDER BY LEFT(CS_REF,3)
OPTION (HASH GROUP)