sql - 在经典的 asp/vbscript SQL 字符串中连接

Question

我想选择列和连接表，其中连接条件将选定的列连接到点上。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TBL2.ID看起来像“ US.NY.61 ”，其中US是TBL1.COUNTRY，NY是TBL1.STATE，等等。

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

Answer 1

试试这样的东西怎么样

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))

在组合和比较它们之前，添加了将 4 个字段转换为 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) ))