Question

我想选择列和连接表，其中连接条件连接所选列以及点。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

数据是TBL2.ID看起来像' US.NY.61 '，其中美国是TBL1.COUNTRY， NY < / strong>是TBL1.STATE等等。

更新：SQl小提琴：http://sqlfiddle.com/#!3/26b6b/4

Answer 1

尝试这样的事情怎么样

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))

添加代码以在合并和比较它们之前将4个字段强制转换为varchar。

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) ))

在经典的asp / vbscript SQL字符串中连接

2 个答案: