您好我有一个大规模的案例陈述，我想知道是否有比我使用的方式更好的方法。代码在我的数据上运行正常，只是想知道一种更容易生成或运行得更快的更好的方法。
SELECT [FileName]
,[sheetname]
,CASE
WHEN [FileName] + '_' + [SheetName] = 'VAL1' + '_' + 'VAL2' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL3' + '_' + 'VAL4' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL5' + '_' + 'VAL6' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL7' + '_' + 'VAL8' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL9' + '_' + 'VAL10' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL11' + '_' + 'VAL12' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL13' + '_' + 'VAL14' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL15' + '_' + 'VAL16' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL17' + '_' + 'VAL18' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL19' + '_' + 'VAL20' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL21' + '_' + 'VAL22' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL23' + '_' + 'VAL24' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL25' + '_' + 'VAL26' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL27' + '_' + 'VAL28' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL29' + '_' + 'VAL30' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL31' + '_' + 'VAL32' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL33' + '_' + 'VAL34' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL35' + '_' + 'VAL36' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL37' + '_' + 'VAL38' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL39' + '_' + 'VAL40' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL41' + '_' + 'VAL42' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL43' + '_' + 'VAL44' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL45' + '_' + 'VAL46' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL47' + '_' + 'VAL48' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL49' + '_' + 'VAL50' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL51' + '_' + 'VAL52' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL53' + '_' + 'VAL54' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL55' + '_' + 'VAL56' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL57' + '_' + 'VAL58' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL59' + '_' + 'VAL60' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL61' + '_' + 'VAL62' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL63' + '_' + 'VAL64' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL65' + '_' + 'VAL66' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL67' + '_' + 'VAL68' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL69' + '_' + 'VAL70' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL71' + '_' + 'VAL72' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL73' + '_' + 'VAL74' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL75' + '_' + 'VAL76' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL77' + '_' + 'VAL78' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL79' + '_' + 'VAL80' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL81' + '_' + 'VAL82' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL83' + '_' + 'VAL84' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL85' + '_' + 'VAL86' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL87' + '_' + 'VAL88' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL89' + '_' + 'VAL90' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL91' + '_' + 'VAL92' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL93' + '_' + 'VAL94' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL95' + '_' + 'VAL96' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL97' + '_' + 'VAL98' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL99' + '_' + 'VAL100' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL101' + '_' + 'VAL102' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL103' + '_' + 'VAL104' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL105' + '_' + 'VAL106' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL107' + '_' + 'VAL108' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL109' + '_' + 'VAL110' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL111' + '_' + 'VAL112' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL113' + '_' + 'VAL114' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL115' + '_' + 'VAL116' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL117' + '_' + 'VAL118' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL119' + '_' + 'VAL120' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL121' + '_' + 'VAL122' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL123' + '_' + 'VAL124' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL125' + '_' + 'VAL126' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL127' + '_' + 'VAL128' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL129' + '_' + 'VAL130' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL131' + '_' + 'VAL132' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL133' + '_' + 'VAL134' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL135' + '_' + 'VAL136' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL137' + '_' + 'VAL138' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL139' + '_' + 'VAL140' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL141' + '_' + 'VAL142' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL143' + '_' + 'VAL144' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL145' + '_' + 'VAL146' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL147' + '_' + 'VAL148' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL149' + '_' + 'VAL150' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL151' + '_' + 'VAL152' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL153' + '_' + 'VAL154' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL155' + '_' + 'VAL156' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL157' + '_' + 'VAL158' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL159' + '_' + 'VAL160' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL161' + '_' + 'VAL162' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL163' + '_' + 'VAL164' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL165' + '_' + 'VAL166' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL167' + '_' + 'VAL168' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL169' + '_' + 'VAL170' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL171' + '_' + 'VAL172' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL173' + '_' + 'VAL174' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL175' + '_' + 'VAL176' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL177' + '_' + 'VAL178' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL179' + '_' + 'VAL180' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL181' + '_' + 'VAL182' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL183' + '_' + 'VAL184' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL185' + '_' + 'VAL186' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL187' + '_' + 'VAL188' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL189' + '_' + 'VAL190' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL191' + '_' + 'VAL192' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL193' + '_' + 'VAL194' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL195' + '_' + 'VAL196' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL197' + '_' + 'VAL198' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL199' + '_' + 'VAL200' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL201' + '_' + 'VAL202' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL203' + '_' + 'VAL204' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL205' + '_' + 'VAL206' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL207' + '_' + 'VAL208' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL209' + '_' + 'VAL210' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL211' + '_' + 'VAL212' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL213' + '_' + 'VAL214' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL215' + '_' + 'VAL216' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL217' + '_' + 'VAL218' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL219' + '_' + 'VAL220' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL221' + '_' + 'VAL222' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL223' + '_' + 'VAL224' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL225' + '_' + 'VAL226' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL227' + '_' + 'VAL228' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL229' + '_' + 'VAL230' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL231' + '_' + 'VAL232' THEN [SHORTNAME]
WHEN [FileName] + '_' + [SheetName] = 'VAL233' + '_' + 'VAL234' THEN [SHORTNAME]
END AS SHORTNAME
,CASE
WHEN [SheetName] LIKE '%SOME_TEXT1%' THEN 'SOME_MORE_TEXT1'
WHEN [SheetName] LIKE '%SOME_TEXT2%' THEN 'SOME_MORE_TEXT2'
WHEN [SheetName] LIKE '%SOME_TEXT3%' THEN 'SOME_MORE_TEXT3'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
WHEN [SheetName] LIKE '%SOME_TEXT%' THEN 'SOME_MORE_TEXT'
END AS SOME_MORE_TEXT
,CASE
WHEN [FileName] LIKE 'ATE_10426%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_12135%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_17251%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_2585X%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_33466%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_43788%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_44935%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_52607%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_56665%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_61659%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_68605%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_75543%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_78984%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_81633%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_89264%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_C5649%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_C6020%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_E2930%' THEN SUBSTRING([FileName],5,5)
WHEN [FileName] LIKE 'ATE_G1255%' THEN SUBSTRING([FileName],5,5)
END AS SUBFILENAME
,CASE
WHEN [Branch] = 'L364X' THEN 'L364X'
WHEN [Branch] = 'K4373' THEN 'K4373'
WHEN [Branch] = 'AD015' THEN 'AD015'
WHEN [Branch] = '38154' THEN '38154'
WHEN [Branch] = '35669' THEN '35669'
WHEN [Branch] = 'K4388' THEN 'K4388'
WHEN [Branch] = 'A4360' THEN 'A4360'
WHEN [Branch] = '8932X' THEN '8932X'
WHEN [Branch] = 'E0530' THEN 'E0530'
END AS Branch
INTO T2
FROM T1
SELECT [FileName]
,[SheetName]
,CASE WHEN [FileName] + '_' + [SheetName] = 'Adhoc Feed Data_Castaways ONEShop' THEN 'Castaw'
WHEN [FileName] + '_' + [SheetName] = 'Adhoc Feed Data_Sol World Spar' THEN 'SolSpr'
WHEN [FileName] + '_' + [SheetName] = 'Adhoc Feed Data_Sunway CoOp' THEN 'SunCO'
答案 0 :(得分：1)
第一种情况与
相同case when Left(FileName,3) = 'VAL'
And IsNumeric(SUbstring(FileName, 4,5)) = 1
And cast(SUbstring(FileName, 4,5) as integer) Between 1 and 123
And Left(SheetName,3) = 'VAL'
And IsNumeric(SUbstring(SheetName, 4,5)) = 1
And cast(SUbstring(SheetName, 4,5) as integer) Between 1 and 123
then Shortname end shortname
第二个，如果我理解你正在尝试正确做什么），则与
相同Replace(FileName, 'SOME_TEXT', 'SOME_MORE_TEXT')
第三个可以替换为
case when Left(FileName, 4) = 'ATE_'
And substring(FileName,5,5) in ('10426', '12135', ... , 'G1255')
then substring(FileName,5,5) end as subFileName
等