problem relating two tables for get same id mysql

Question

I have problems to relate the columns of two tables

this is my table1 structure

where I want to relate the identify column to the id of table 2

this is my table2 structure

this is my query

$id             = (!empty($_GET['id']) ? $_GET['id'] : 0);
    $example1       = (!empty($_REQUEST['example1']) ? $_REQUEST['example1'] : '');
    $example2 = (!empty($_REQUEST['example2']) ? $_REQUEST['example2'] : '');
    $consult  = "SELECT a.id, a.user, a.date, a.action
    FROM table1 a
    INNER JOIN table2 b on b.idwork = $id
    WHERE module = 'Activity ".$idexample1."|".$idexample2."' AND identifier = $id ORDER BY id DESC ";

I get this after run my query

SELECT a.id, a.user, a.date, a.action 
        FROM table1 a
        INNER JOIN table2 b on b.id = 244
        WHERE module = 'activity 1|98' AND identificador = 244 ORDER BY id DESC 

what I try is to relate and make is that $id be the same identifier number

Answer 1

The join should be based ON the equality of the columns b.id and a.identifier :

SELECT a.id, a.user, a.date, a.action 
FROM table1 a INNER JOIN table2 b 
ON b.id = a.identifier
WHERE a.module = 'activity 1|98' AND b.idwork = 244 
ORDER BY a.identifier DESC 

I used also the WHERE clause from your code and changed the column names to the ones of your sample data.