SQL: Get all records from one table AND a count of records from a second table?

Question

Say there are two tables:

TABLE A

messageID / Message                     / More..
1         / This is the first message   / Etc..
2         


        

Answer 1

You can use CTE for the same.

;WITH CTE_MessageCount (MessageId, Count)
AS
(
SELECT MessageId, Count(*) FROM TableB GROUP BY MessageId
) 

SELECT A.*, T.*
FROM tableA A JOIN CTE_MessageCount T ON A.messageID = T.MessageID