`emp_id` = `addprojects`.`emp_id` where `emp_id` = $emp_id)"
"SQLSTATE23000:完整性约束违反: where子句中的1052列'emp_id‘是不明确的(SQL: select* from users in addprojects on users.emp_id = addprojects.emp_id addprojec
formations.employee_id', '=','employees.id')
but it return the following error SQLSTATE23000:完整性约束冲突: 1052 order子句中的列'created_at‘不明确(SQL: select * from formations inner join employees