SQL WHERE 中的 CASE 逻辑

Question

我收到一条错误消息 Incorrect syntax near '>' 每个字段都包含十进制值，具有 NOT NULL 和默认值零。我尝试了不同的括号，我相信我只是在某处遗漏了 CASE 语句的格式。

AND CASE WHEN QtyIssued <> 0 OR WM.QtyToMake <> 0 OR WMat.UnitQtyReqd <> 0 THEN QtyIssued/WM.QtyToMake * WMat.UnitQtyReqd >= .68 ELSE 0 END

我需要检查每个值中的零，这样我就不会被零除

整个SQL如下：

    SELECT  SUBSTRING([SalesOrder], PATINDEX('%[^0]%', [SalesOrder]+'|'),                               LEN([SalesOrder])) AS SO, WM.SalesOrderLine AS SOLine, 
        SUBSTRING(WM.Job, PATINDEX('%[^0]%', WM.Job+'|'), LEN(WM.Job)) AS Job, WMat.StockCode, --WM.QtyToMake * WMat.UnitQtyReqd AS Qty2IssuedValue, 
        CEILING(WM.QtyToMake * WMat.UnitQtyReqd) AS Qty2Issue, 
                        CEILING(WMat.QtyIssued) AS QtyIssued, WMP.WipRelease, WM.JobTenderDate, 
                        WM.Complete , 
                        CASE WHEN QtyIssued = 0 OR WM.QtyToMake = 0 OR WMat.UnitQtyReqd = 0 
                        THEN 0 ELSE (QtyIssued/(WM.QtyToMake * WMat.UnitQtyReqd)) END AS QtyNotAllocated
FROM            dbo.WipMaster AS WM INNER JOIN
                         dbo.[WipMaster+] AS WMP ON WM.Job = WMP.Job FULL OUTER JOIN
                         dbo.WipJobAllMat AS WMat ON WM.Job = WMat.Job
WHERE        (WMP.WipRelease BETWEEN CONVERT(DATETIME, '2016-04-01 00:00:00', 102) AND 
                                    CONVERT(DATETIME, '2016-04-29 00:00:00', 102)) 
                                    AND CASE WHEN QtyIssued <> 0 OR WM.QtyToMake <> 0 OR WMat.UnitQtyReqd <> 0 THEN QtyIssued/WM.QtyToMake * WMat.UnitQtyReqd >= .68 ELSE 0 END

Answer 1

where中的case是：

(CASE WHEN QtyIssued <> 0 OR WM.QtyToMake <> 0 OR WMat.UnitQtyReqd <> 0
      THEN QtyIssued/WM.QtyToMake * WMat.UnitQtyReqd >= .68
      ELSE 0
 END)

这不是布尔表达式。我什至不确定你的意图。也许：

((QtyIssued <> 0 OR WM.QtyToMake <> 0 OR WMat.UnitQtyReqd <> 0) AND
 QtyIssued/NULLIF(WM.QtyToMake, 0) * WMat.UnitQtyReqd >= .68
)

NULLIF() 防止被零除。

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