MySQL join tables where table name is a field of another table

Question

I have 5 tables. One primary and 4 additional (they have different columns).

1. objects
2. obj_mobiles
3. obj_tablets
4. obj_computers

Answer 1

USE CONCAT to create your prepare statement. eg.

@sql = CONCAT('SELECT * FROM objects AS object LEFT JOIN ', @tbl, ' AS info ON object.id = info.obj_id');
PREPARE stmnt FROM @sql;
...