Question

Using MySQL syntax, how would I write a query to return the following (I am including the two table descriptions and the relationship between them):

TABLE_A (ID, DATE, TABLE_C_ID) TABLE_B (ID, AMOUNT, TABLE_A_ID) TABLE_C (ID) 

I want to return the following, with the specified limitations:

SELECT      TABLE_A.ID,      TABLE_A.DATE      (SUM TABLE_B.AMOUNT           FROM TABLE_B           WHERE TABLE_B.ID = TABLE_A.ID)      FROM TABLE_A, TABLE_B      WHERE TABLE_A.TABLE_C_ID = 123 

Thanks in advance.

Answer 1

What’s wrong with doing it thus?:

SELECT      TABLE_A.ID,      TABLE_A.DATE,     SUM( TABLE_B.AMOUNT ) AS AMOUNT  FROM TABLE_A  INNER JOIN TABLE_B  ON TABLE_B.ID = TABLE_A.ID  WHERE TABLE_A.TABLE_C_ID = 123  GROUP BY TABLE_A.ID,      TABLE_A.DATE