IZ
select * from performance_schema.user_variables_by_thread where thread_id = ???;
Size: a a a
IZ
select * from performance_schema.user_variables_by_thread where thread_id = ???;
ВР
ВР
IZ
ВР
ВД
G
G
G
ВД
V
G
G
IZ
RG
SELECT p.id
FROM posts p;
LEFT JOIN comments c
ON c.post_id = p.id
GROUP BY p.id
HAVING COUNT(c.id) = 0
S
SELECT p.id
FROM posts p;
LEFT JOIN comments c
ON c.post_id = p.id
GROUP BY p.id
HAVING COUNT(c.id) = 0
IZ
SELECT p.id
FROM posts p;
LEFT JOIN comments c
ON c.post_id = p.id
GROUP BY p.id
HAVING COUNT(c.id) = 0
RG
IZ
SELECT p.id
FROM posts p;
LEFT JOIN comments c
ON c.post_id = p.id
GROUP BY p.id
HAVING COUNT(c.id) = 0