如何比较来自不同表的值具有相同名称的mysql

Question

i have 2 tables

table A

Question|Answer
-------------------
    a   |  y

table B

Type  |  Question
------------------
  3   |   a
---------------
  1   |   b

how do i check what type question A is from Table A by looking at it from table B? i want to check if question a from table A is type 3 (do this) if it is type 1 (do this) cant find the right query

maybe Select type from table B where tableA.question = tableB.question

Answer 1

SELECT b.Type FROM TableA a, TableB b WHERE a.Question=b.Question

Answer 2

Effectively what you need to do here is perform a join in your query, so that you return the type along with the question and answer in your result set.

You can use the following SQL;

SELECT a.question, a.answer, b.type FROM TableA a INNER JOIN TableB b ON a.question=b.question

Hope this helps.

Answer 3

You can JOIN both tables and then perform the logic in PHP.

SELECT 
    a.question as question,
    a.answer as answer,
    b.type as type
FROM
    table_a a, table_b b
WHERE
    a.question = b.question;