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這是一個傳統的查詢，我正在清理，我對這個case語句感到困惑，所以任何幫助將不勝感激。T-SQL病例陳述混淆
SELECT CASE
WHEN bitdelivered = 1 THEN
'' + CONVERT(CHAR(10), deliv.dtmdeliverydate, 101)
+ ' '
+ 'þ' + '
' -- this is a carriage return, do not remove it
WHEN bitdelivered = 0 AND deliv.dtmdeliverydate < Getdate() THEN
'' + CONVERT(CHAR(10), deliv.dtmdeliverydate, 101)
+ ' '
+ '¨' + '
'
ELSE
'' + CONVERT(CHAR(10), deliv.dtmdeliverydate, 101)
+ ' '
+ '¨' + '
'
END
就像我說的這是非常骯髒，但是當我運行整個查詢，如果我得到一個0 bitdelivered的casestatement的作品，因爲它應該，但如果我有1回，然後我返回null而不是else塊。有任何想法嗎？
編輯我已編輯的代碼如下所示，可讀性更強，我仍然得到空...
select
CONVERT(CHAR(10), deliv.dtmdeliverydate, 101) +
' ' +
CASE
WHEN bitdelivered = 1 THEN 'þ'
ELSE '¨'
END + '
'
編輯×2這裏是整個（很討厭的，我知道的）SQL查詢，我沒有寫這個，我只是試圖把它清理乾淨......
SELECT dbo.tblrequirements.guidrequirementid,
tblcontracting.strdescription AS
strcontracting,
dbo.viewawardnumbers.strcontractnumber AS
strawardnumber,
Ltrim(Rtrim(dbo.viewawardnumbers.strtonumber)) AS strtonumber,
dbo.tblrequirements.strdescription,
dbo.tblezquerycontractvalue.curtotalvalue,
dbo.tblcodescontractvehicles.strdescription AS
strcontractvehicle,
tblcustomer.stracronym AS strcustomer,
dbo.tblcodesrequirementstatuses.strdescription AS strstatus,
Substring(dbo.tblrequirements.strnotes, 0, 512) AS strnotes,
Coalesce (dbo.tblrequirements.guidfromid,
'00000000-0000-0000-0000-000000000000'
) AS guidfromid,
Coalesce (dbo.viewteammembers.guidpersonid,
'00000000-0000-0000-0000-000000000000') AS guidpersonid
,
dbo.viewcurrentoptions.dtmstart,
dbo.viewcurrentoptions.dtmend,
Dateadd(d, -60, dbo.viewcurrentoptions.dtmend) AS
dtm1stnoticedue,
Dateadd(d, -30, dbo.viewcurrentoptions.dtmend) AS
dtm2ndnoticedue,
dbo.tblcontractdates.dtmcontractstart,
dbo.tblcontractdates.dtmcontractend,
Isnull(dbo.viewteammembers.strshortname, ' Not Assigned') AS strshortname
,
dbo.tblezqueryfunding.curtotalfunded,
CASE
WHEN (dbo.tblcodesrequirementstatuses.strdescription =
'Pre-Solicitation'
OR dbo.tblcodesrequirementstatuses.strdescription =
'Solicitation'
OR dbo.tblcodesrequirementstatuses.strdescription =
'Source Selection'
) THEN 'P'
WHEN (Coalesce (dbo.tblcodesprocurementtypes.strcode, '') <> 'IT'
AND Coalesce (dbo.tblcodesprocurementtypes.strcode, '') <> 'OPS'
) THEN
'S'
ELSE 'C'
END AS strproctype,
dbo.tblcodesprocurementtypes.strcode,
dbo.tblcodesprocurementtypes.strdescription AS strprocdesc,
deliveries.dtmdeliverydate,
deliveries.bitdelivered,
CASE
WHEN (dbo.tblcodesrequirementstatuses.strdescription =
'Pre-Solicitation'
OR dbo.tblcodesrequirementstatuses.strdescription =
'Solicitation'
OR dbo.tblcodesrequirementstatuses.strdescription =
'Source Selection'
) THEN 'Initial Start Date'
WHEN (Coalesce (dbo.tblcodesprocurementtypes.strcode, '') <> 'IT'
AND Coalesce (dbo.tblcodesprocurementtypes.strcode, '') <> 'OPS'
) THEN
'POP'
ELSE 'Delivery Date'
END AS
colpopdelivdt,
CASE
WHEN (dbo.tblcodesrequirementstatuses.strdescription =
'Pre-Solicitation'
OR dbo.tblcodesrequirementstatuses.strdescription =
'Solicitation'
OR dbo.tblcodesrequirementstatuses.strdescription =
'Source Selection'
) THEN 'Req Award Date'
WHEN (Coalesce (dbo.tblcodesprocurementtypes.strcode, '') <> 'IT'
AND Coalesce (dbo.tblcodesprocurementtypes.strcode, '') <> 'OPS'
) THEN
'Option Notice'
ELSE 'Delivered'
END AS
coloptnotdeliv,
tblpresolicitations.dtmcontacted,
tblpresolicitations.dtmrequiredby,
tblpresolicitations.dtmawardnotice,
strjobid,
bitprimary
FROM dbo.tblrequirements
INNER JOIN dbo.tblcodesrequirementstatuses
ON dbo.tblcodesrequirementstatuses.strcode =
dbo.tblrequirements.strstatusid
LEFT OUTER JOIN dbo.tblezquerycontractvalue
ON dbo.tblezquerycontractvalue.guidrequirementid =
dbo.tblrequirements.guidrequirementid
LEFT OUTER JOIN dbo.viewawardnumbers
ON dbo.viewawardnumbers.guidrequirementid =
dbo.tblrequirements.guidrequirementid
LEFT OUTER JOIN dbo.tblezqueryfunding
ON dbo.tblezqueryfunding.strawardnumber =
dbo.viewawardnumbers.strawardnumber
LEFT OUTER JOIN dbo.viewcurrentoptions
ON dbo.tblrequirements.guidrequirementid =
dbo.viewcurrentoptions.guidrequirementid
LEFT OUTER JOIN dbo.viewteammembers
ON dbo.viewteammembers.guidrequirementid =
dbo.tblrequirements.guidrequirementid
LEFT OUTER JOIN dbo.tblcontracts
ON dbo.tblcontracts.guidrequirementid =
dbo.tblrequirements.guidrequirementid
LEFT OUTER JOIN dbo.tblcontractdates
ON dbo.tblcontractdates.guidrequirementid =
dbo.tblrequirements.guidrequirementid
LEFT OUTER JOIN dbo.tblcodescontractvehicles
ON dbo.tblcodescontractvehicles.strcode = dbo.tblcontracts.strvehicleid
LEFT OUTER JOIN dbo.tblorganizations AS tblcontracting
ON dbo.tblrequirements.guidfromid = tblcontracting.guidorgid
LEFT OUTER JOIN dbo.tblorganizations AS tblcustomer
ON dbo.tblrequirements.guidtoid = tblcustomer.guidorgid
LEFT OUTER JOIN dbo.tblpresolicitations
ON dbo.tblpresolicitations.guidrequirementid =
dbo.tblrequirements.guidrequirementid
LEFT OUTER JOIN dbo.tblcodesprocurementtypes
ON dbo.tblcodesprocurementtypes.strcode =
dbo.tblpresolicitations.strprocurementtypeid
LEFT OUTER JOIN (SELECT guidrequirementid,
REPLACE(REPLACE(REPLACE (
(select
ISNULL(CONVERT(CHAR(10), deliv.dtmdeliverydate, 101), '(no date)') +
' ' +
CASE
WHEN bitdelivered = 1 THEN 'þ'
ELSE '¨'
END + '
'
/*(SELECT CASE
WHEN bitdelivered = 1
THEN
''
+
CONVERT(CHAR(10),
deliv.dtmdeliverydate,
101) +
' '
+ 'þ' + '
'
WHEN bitdelivered = 0
AND deliv.dtmdeliverydate < Getdate() THEN
'' +
CONVERT(CHAR(10), deliv.dtmdeliverydate, 101) +
' '
+ '¨' + '
'
ELSE
'' + CONVERT(CHAR(10), deliv.dtmdeliverydate, 101) +
' '
+ '¨' + '
'
END*/
FROM tblclins clins
INNER JOIN tblcommodities commod
ON commod.guidclinid = clins.guidclinid
INNER JOIN tbldeliveries deliv
ON deliv.guidcommodityid = commod.guidcommodityid
WHERE clins.guidrequirementid = req.guidrequirementid
AND deliv.bitdelivered = 0
ORDER BY guidrequirementid,
deliv.dtmdeliverydate
FOR XML PATH('')), '<', '<'), '>', '>'), '&', '&') AS dtmdeliverydate
,
Stuff ((SELECT '|' + CAST(bitdelivered AS CHAR(1))
FROM tblclins clins
INNER JOIN tblcommodities commod
ON commod.guidclinid = clins.guidclinid
INNER JOIN tbldeliveries deliv
ON deliv.guidcommodityid = commod.guidcommodityid
WHERE clins.guidrequirementid = req.guidrequirementid
ORDER BY guidrequirementid
FOR XML PATH('')), 1, 1, '') AS bitdelivered
FROM tblrequirements req
GROUP BY guidrequirementid) deliveries
ON deliveries.guidrequirementid = dbo.tblrequirements.guidrequirementid
上帝保佑你，這是醜陋=/ – Yuck 2012-01-04 16:29:38
難道'deliv.dtmdeliverydate'爲空？我希望不會因爲你的'bitdelivered'是1。 – 2012-01-04 16:30:34
@PhilKlein不是不是null – EvanGWatkins 2012-01-04 16:33:51