表1中每一行的表2中的mysql INSERT数据

Question

I have two tables.

Table A is a list of questions that needs to be filtered by question type. eg SELECT * from TableA WHERE Qtype = "whatever"

I then need to add four new records to Table B for each record pulled by the query on TableA.

Table A and Table B join on an ID number - TableA.id = TableB.questionid

I am presuming I will need to run it four times, once for each record that I add.

I am getting confused on the FOR EACH command in conjunction with an INNER JOIN

Would appreciate any help!

Answer 1

I'm afraid I still don't fully understand your question, but this will insert three records into TableB for each record of TableA , with three different values for newfield :

INSERT INTO TableB (ID, newfield) (
  SELECT a.ID, n.newfield
  FROM (
    SELECT 'Excellent' AS newfield UNION ALL
    SELECT 'Something' UNION ALL
    SELECT 'Something else'
  ) n
  CROSS JOIN TableA a
)

Answer 2

Try this 4 times :

INSERT INTO TableB (questionid, otherfieldB)
VALUES (
    SELECT id, otherfieldA
    FROM TableA
    WHERE Qtype = "whatever"
)