Question

我在子报表中有以下SQL查询：

select ifnull(sum (commissionDocument.netto), 0) as commissionCreditNoteNetValue,
   ( select ifnull (sum (commissionDocument.netto ), 0)
     from tckopf as commissionDocument
     where commissionDocument.referenzid = $P{document_id} 
       and commissionDocument.btyp = 7) as commissionInvoiceNetValue
from tckopf as commissionDocument
where commissionDocument.referenzid = $P{document_id} 
  and commissionDocument.btyp = 8

问题是，如果where子句：

，我会得到一个空报告

where commissionDocument.referenzid = $P{document_id} 
  and commissionDocument.btyp = 8

不匹配，其他where子句匹配。

where commissionDocument.referenzid = $P{document_id} 
  and commissionDocument.btyp = 7

SQL Fiddle example if the inner where clause match
SQL Fiddle example if both where clauses match
SQL Fiddle example if the outer where clause match

我忘了提及，FoxPro DBF包含数据，并通过JDBC驱动程序连接到 iReport 。

子报表只有一个字段，其中包含以下表达式：

($F{commissionInvoiceNetValue} != null && $F{commissionCreditNoteNetValue} != null)
? ($F{commissionInvoiceNetValue} - $F{commissionCreditNoteNetValue})
: ($F{commissionInvoiceNetValue} != null) ? $F{commissionInvoiceNetValue}
: ($F{commissionCreditNoteNetValue} != null) ? $F{commissionCreditNoteNetValue}
: ""

我该如何绕过它？

Answer 1

我changed the query来：

SELECT
(   SELECT IFNULL (SUM (commissionInvoice.netto ), 0) AS commissionInvoiceNetValue
    FROM tckopf AS commissionInvoice
    WHERE commissionInvoice.referenzid = 1
        AND commissionInvoice.btyp = 5 )
-
(   SELECT IFNULL (SUM (commissionCreditNote.netto), 0) AS commissionCreditNoteNetValue
    FROM tckopf AS commissionCreditNote
    WHERE commissionCreditNote.referenzid = 1
        AND commissionCreditNote.btyp = 6 )
 AS commissionResult

和以下表达式的字段：

$F{commissionResult}

现在我得到了理想的结果。

Answer 2

我很瘦你可以通过外连接解决这个问题：

select ifnull(sum (cDoc.netto), 0) as cCNValue, CInvNoteVal.Val
from tckopf as cDoc
FULL OUTER JOIN
  (select ifnull (sum (cDoc.netto ), 0) AS Val, referenzid 
  from tckopf as cDoc
  where cDoc.referenzid = $P{document_id} and cDoc.btyp = 7) as CInvNoteVal
  ON CInvNoteVal.referenzid = cDoc.referenzid
  where cDoc.referenzid = $P{document_id} and cDoc.btyp = 8

如果where子句不匹配，则为列选择获取0

2 个答案: