在经典的asp/vbscript SQL字符串中连接

Question

我想选择列和连接表，其中连接条件连接点以外的所选列。对于例如

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

的数据是，这样TBL2.ID看起来像 'US.NY.61'，其中美国是TBL1.COUNTRY，纽约是TBL1.STATE等

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

Answer 1

如何尝试这样的事情

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)) 

在组合和比较它们之前添加了将4个字段强制转换为varchar的代码。

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)))