how to MYSQL compare values from same columns

Question

how do i compare 1 table in mysql? with the following table

name table belajar

   id model name
   1 AAA AAA
   2 BBB BBB
   3 CCC CCC

and I want to generate a query

  id name model idmodel namemodel modelmodel
  1 AAA AAA 2 BBB BBB
  1 AAA AAA 3 CCC CCC
  2 BBB BBB 1 AAA AAA
  2 BBB BBB 3 CCC CCC
  3 CCC CCC 1 AAA AAA
  3 CCC CCC 2 BBB BBB

Answer 1

It sounds like maybe a self join is what you want here:

SELECT
    t1.id,
    t1.name,
    t1.model,
    t2.id AS idmodel,
    t2.name AS namemodel,
    t2.model AS modelmodel
FROM yourTable t1
INNER JOIN yourTable t2
    ON t1.name <> t2.name AND
       t1.model <> t2.model;
ORDER BY
    t1.id,
    t2.id;

The join criteria is basically a cross join, except that you don't want to match two records if the names and models be the same.