完整性约束违规：1052 列 'group_id' 在 where 子句不明确

Question

I'm trying to do inner join for groups table and status table but it stated this error:

Fatal error: Uncaught PDOException: SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'group_id' in where clause is ambiguous in C:\xampp\xampp\htdocs\mindspace\libs\database.php:27 Stack trace: #0 C:\xampp\xampp\htdocs\mindspace\libs\database.php(27): PDOStatement->execute(Array) #1 C:\xampp\xampp\htdocs\mindspace\Business Services Layer\ManageGroupsModel\GroupsModel.php(36): DB::run('select status.s...', Array) #2 C:\xampp\xampp\htdocs\mindspace\Business Services Layer\ManageGroupsController\GroupsController.php(40): ManageGroupsModel->displayStatus() #3 C:\xampp\xampp\htdocs\mindspace\Application Layer\ManageGroupsView\view_group.php(13): ManageGroupsController->displayStatus('12') #4 {main} thrown in C:\xampp\xampp\htdocs\mindspace\libs\database. php on line 27

function displayStatus() {
  $sql = "select status.status_content, groups.group_name from status inner join groups on status.group_id = groups.group_id  where group_id=:group_id";
  $args = [':group_id'=>$this->group_id];
  return DB::run($sql, $args);
}

Can anyone please help me cause I'm not sure which part did I do wrongly.

Answer 1

You've got two group_id fields in your results. mySQL isn't sure which one you want to test in your WHERE clause. You need to specify it using the correct alias (as you've done in the JOIN already).