Explain Query (mysql)
EXPLAIN
SELECT iqa.interactive_question_answer_id, IFNULL(l_value, `value`) as `value`, `type`, level
FROM interactive_questions_answers iqa
LEFT JOIN interactive_questions_answersLang iqal ON iqa.interactive_question_answer_id = iqal.interactive_question_answer_id
AND lang_id = 'en'
WHERE iqa.interactive_question_answer_id = 4
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | iqa | const | PRIMARY | PRIMARY | 4 | const | 1 | 100.00 | ||
| 1 | SIMPLE | iqal | ALL | 242 | 100.00 | Using where |