SELECT table1.field1, table2.field2
FROM table1
LEFT JOIN table2 ON table1.field1, table2.field1
GROUP BY table1.field1
MySQL: ✅ All right!
SELECT table1.field1, table2.field2
FROM table1
LEFT JOIN table2 ON table1.field1, table2.field1
GROUP BY table1.field1
MySQL: ✅ All right!