在經典的asp/vbscript SQL字符串中連接

Question

我想選擇列和連接表，其中連接條件連接點以外的所選列。對於例如

SELECT TBL1.ID, 
TBL1.COUNTRY As A, 
TBL1.STATE As B, 
TBL1.CODE As C 
FROM TBL1, TBL2 
WHERE TBL2.ID = A+'.'+B+'.'+C 

的數據是，這樣TBL2.ID看起來像 'US.NY.61'，其中美國是TBL1.COUNTRY，紐約是TBL1.STATE等

UPDATE：SQL小提琴：http://sqlfiddle.com/#!3/26b6b/4

Answer 1

如何嘗試這樣的事情

SELECT TBL1.ID, 
TBL1.COUNTRY As A, 
TBL1.STATE As B, 
TBL1.CODE As C 
FROM TBL1 
    INNER JOIN TBL2 ON CAST(TBL1.COUNTRY AS varchar(20)) + '.' + CAST(TBL1.STATE AS varchar(20)) + '.' + CAST(TBL1.CODE AS varchar(20)) = CAST(TBL2.ID AS varchar(20)) 

在組合和比較它們之前添加了將4個字段強制轉換爲varchar的代碼。

Answer 2

SELECT T.name,T2.nam FROM 
T INNER JOIN T2 
ON T.id = (T2.one + '.' + CAST(T2.two as varchar(50)) + '.' + CAST(T2.thr as varchar(50)))