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

Try this query:

SELECT a.*, b.msgCount
  FROM tableA a LEFT JOIN 
    ( SELECT messageID, COUNT(1) AS msgCount FROM tableB b GROUP BY messageID) b
        ON a.messageID =  b.messageID