SQL Server中的简单联接

Question

I am currently trying to join table 1 and table 2 to get the third table 3 but I am having trouble. The A and B are similar for each. They can be linked by Company_ID .

Answer 1

Not sure what exactly the problem is, but here's the syntax for performing a simple join on company_id and assuming you only want a and b once:

SELECT t1.a, t1.b, c, d, e, f
FROM   t1
JOIN   t2 ON t1.company_id = t2.company_id

Answer 2

When I first had to use a join, I found this article by Jeff Atwood very helpful.

http://blog.codinghorror.com/a-visual-explanation-of-sql-joins/