Question

我正在尝试根据case语句更改where子句的条件。问题是它不喜欢'之间'声明。我可以在那里使用案例更改“Where”标准吗？这是导致问题的原因（关键字'之间'附近的语法不正确。）我想在日期范围内从PMF_FISCALCALENDAR表中获取会计月份。问题是一个日期范围可能是一个无效的数字，在这种情况下我需要使用第二个日期。

关键字'between'附近的语法不正确。

,(select PERIOD =
    CASE 
        WHEN PERIOD = '1' THEN
            'Jan'           
        WHEN Period = '2' THEN
            'Feb'
        WHEN PERIOD = '3' THEN
            'Mar'
        WHEN Period = '4' THEN
            'Apr'
        WHEN PERIOD = '5' THEN
            'May'
        WHEN Period = '6' THEN
            'Jun'
        WHEN PERIOD = '7' THEN
            'Jul'
        WHEN Period = '8' THEN
            'Aug'
        WHEN PERIOD = '9' THEN
            'Sep'
        WHEN Period = '10' THEN
            'Oct'
        WHEN PERIOD = '11' THEN
            'Nov'
        WHEN Period = '12' THEN
            'Dec'

    END

FROM PMF_FISCALCALENDAR 
WHERE 
(CASE
    WHEN YEAR(SALESQUOTATIONLINE.KTI_SENTDATE) = 1900  Then
            SALESQUOTATIONLINE.KTI_SENTDATE between PMF_FISCALCALENDAR.STARTDATE and PMF_FISCALCALENDAR.ENDDATE
        ELSE 
            SALESQUOTATIONTABLE.PMF_QUOTESENTDATE between PMF_FISCALCALENDAR.STARTDATE and PMF_FISCALCALENDAR.ENDDATE
END)
    ) AS 'Fiscal Month Sent'

我想使用一个或另一个案例结果作为where子句标准。我正在使用SQL SERVER 2005

Answer 1

将语句更改为

WHERE 
    CASE
        WHEN YEAR(SALESQUOTATIONLINE.KTI_SENTDATE) = 1900  Then
                SALESQUOTATIONLINE.KTI_SENTDATE 
            ELSE 
                SALESQUOTATIONTABLE.PMF_QUOTESENTDATE 
    END between PMF_FISCALCALENDAR.STARTDATE and PMF_FISCALCALENDAR.ENDDATE

Answer 2

尝试使用此方法以获得更好的语法和性能：

SELECT PERIOD = convert(char(3), dateadd(m, PERIOD, -1), 0)
FROM PMF_FISCALCALENDAR 
WHERE 
    SALESQUOTATIONLINE.KTI_SENTDATE < '1901-01-01' AND
    SALESQUOTATIONLINE.KTI_SENTDATE >= '1900-01-01' AND
    SALESQUOTATIONLINE.KTI_SENTDATE between PMF_FISCALCALENDAR.STARTDATE and PMF_FISCALCALENDAR.ENDDATE
or
    (SALESQUOTATIONLINE.KTI_SENTDATE <  '1900-01-01' or
     SALESQUOTATIONLINE.KTI_SENTDATE >= '1901-01-01' or 
     SALESQUOTATIONLINE.KTI_SENTDATE is null) AND
    SALESQUOTATIONTABLE.PMF_QUOTESENTDATE between PMF_FISCALCALENDAR.STARTDATE and PMF_FISCALCALENDAR.ENDDATE

案例中的Where子句

2 个答案: