Sql递归查询错误

Question

WITH BomTree (
    ITEMNO
    ,[DESC]
    ,BOMNO
    ,BUILDQTY
    ,UNIT
    ,COMPONENT
    ,[Comp Desc]
    ,[Comp-Qty]
    ,COMPBOMNO
    ,Depth
    )
AS (
    SELECT bomh.ITEMNO
        ,itm1.DESC]
        ,bomh.BOMNO
        ,bomh.BUILDQTY
        ,bomh.UNIT
        ,bomd.COMPONENT
        ,itm.[DESC] [Comp Desc]
        ,bomd.QTY [Comp-Qty]
        ,bomd.COMPBOMNO
        ,0 AS Depth
    FROM ICBOMH bomh
    INNER JOIN ICBOMD bomd ON bomh.BOMNO = bomd.BOMNO
        AND bomh.ITEMNO = bomd.ITEMNO
    INNER JOIN ICITEM itm1 ON bomd.ITEMNO = itm1.ITEMNO
    INNER JOIN ICITEM itm ON bomd.COMPONENT = itm.ITEMNO
    WHERE bomd.BOMNO = '01'
        AND bomd.ITEMNO = '300060397'

    UNION ALL

    SELECT bomh.ITEMNO
        ,itm1.DESC]
        ,bomh.BOMNO
        ,bomh.BUILDQTY
        ,bomh.UNIT
        ,bomd.COMPONENT
        ,itm.[DESC] [Comp Desc]
        ,(t.[Comp-Qty] * bomd.QTY) AS [Comp-Qty]
        ,bomd.COMPBOMNO
        ,t.Depth + 1 AS Depth
    FROM ICBOMH bomh
    INNER JOIN ICBOMD bomd ON bomh.BOMNO = bomd.BOMNO
        AND bomh.ITEMNO = bomd.ITEMNO
    INNER JOIN ICITEM itm1 ON bomd.ITEMNO = itm1.ITEMNO
    INNER JOIN ICITEM itm ON bomd.COMPONENT = itm.ITEMNO
    INNER JOIN BomTree AS t ON bomd.ITEMNO = t.COMPONENT
    )
SELECT ITEMNO
    ,[DESC]
    ,BOMNO
    ,BUILDQTY
    ,UNIT
    ,COMPONENT
    ,[Comp Desc]
    ,[Comp-Qty]
    ,COMPBOMNO
    ,Depth
FROM BomTree
GROUP BY ITEMNO
    ,[DESC]
    ,BOMNO
    ,BUILDQTY
    ,UNIT
    ,COMPONENT
    ,[Comp Desc]
    ,[Comp-Qty]
    ,COMPBOMNO
    ,Depth;

error:Types don't match between the anchor and the recursive part in column "Comp-Qty" of recursive query "BomTree".

Answer 1

首先，这个错误意味着两个联合查询中相同列之间的数据类型不匹配。为了解决这个问题，您可以像这样重写您的查询：

WITH BomTree 
AS (
    SELECT bomh.ITEMNO
        ,itm1.[DESC]
        ,bomh.BOMNO
        ,bomh.BUILDQTY
        ,bomh.UNIT
        ,bomd.COMPONENT
        ,itm.[DESC] [Comp Desc]
        ,cast(bomd.QTY as int) [Comp-Qty]  --cast as integer 
        ,bomd.COMPBOMNO
        ,0 AS Depth
    FROM ICBOMH bomh
    INNER JOIN ICBOMD bomd ON bomh.BOMNO = bomd.BOMNO
        AND bomh.ITEMNO = bomd.ITEMNO
    INNER JOIN ICITEM itm1 ON bomd.ITEMNO = itm1.ITEMNO
    INNER JOIN ICITEM itm ON bomd.COMPONENT = itm.ITEMNO
    WHERE bomd.BOMNO = '01'
        AND bomd.ITEMNO = '300060397'

    UNION ALL

    SELECT bomh.ITEMNO
        ,itm1.DESC]
        ,bomh.BOMNO
        ,bomh.BUILDQTY
        ,bomh.UNIT
        ,bomd.COMPONENT
        ,itm.[DESC] [Comp Desc]
        ,cast((t.[Comp-Qty] * bomd.QTY) as int)  AS [Comp-Qty] --cast as integer 
        ,bomd.COMPBOMNO
        ,t.Depth + 1 AS Depth
    FROM ICBOMH bomh
    INNER JOIN ICBOMD bomd ON bomh.BOMNO = bomd.BOMNO
        AND bomh.ITEMNO = bomd.ITEMNO
    INNER JOIN ICITEM itm1 ON bomd.ITEMNO = itm1.ITEMNO
    INNER JOIN ICITEM itm ON bomd.COMPONENT = itm.ITEMNO
    INNER JOIN BomTree AS t ON bomd.ITEMNO = t.COMPONENT
    )
SELECT DISTINCT ITEMNO
    ,[DESC]
    ,BOMNO
    ,BUILDQTY
    ,UNIT
    ,COMPONENT
    ,[Comp Desc]
    ,[Comp-Qty]
    ,COMPBOMNO
    ,Depth
FROM BomTree;

Sql递归查询错误

Sql recursive query error

sql-server

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recursive-query