如何将此查询转换为Laravel查询生成器？

Question

I am not sure about the inner SQL inside time_diff method:

SELECT t1.started_at as chain_break,
time_to_sec(timediff(t1.started_at,IFNULL(
                                          (SELECT MAX(t2.ended_at)
                                           FROM status_records t2
                                           WHERE t2.user_id=189
                                           AND t2.started_at< t1.started_at
                                          ), t1.started_at
                                        )
                        )
                ) / 3600 AS time_off 
FROM status_records t1 
WHERE t1.user_id=189 
ORDER BY t1.ended_at DESC 
LIMIT 6

Is there a nice way to do it except putting this query in DB::query as raw SQL?

Answer 1

Yes, there is, you can use selectRaw() to add your subquery as a field selection. To create the subquery, you can create another query builder.

Answer 2

Try This

DB::raw("SELECT t1.started_at as chain_break,
time_to_sec(timediff(t1.started_at,IFNULL(
                                          (SELECT MAX(t2.ended_at)
                                           FROM status_records t2
                                           WHERE t2.user_id=189
                                           AND t2.started_at< t1.started_at
                                          ), t1.started_at
                                        )
                        )
                ) / 3600 AS time_off 
FROM status_records t1 
WHERE t1.user_id=189 
ORDER BY t1.ended_at DESC 
LIMIT 6");