Tagged Questions
0
votes
2answers
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How do I use subquery on the same table in MySQL?
I have a query like this which takes a really long time to run. The table is around 4 million rows.
DELETE FROM TABLE WHERE value_was IS NULL OR value_was <= value_now;
I'm hoping I could ...
1
vote
1answer
28 views
Identical subquery optimisation in an update
update activitybooking set `submitted`='1' where id='958'
and (select SUM(pool1_count) from (select pool1_count from `activitybooking` where `abt`='12' and
(id='958' or ...
1
vote
1answer
48 views
Query from database
I have a table named mip. The table has primary key id, a foreign key product_id and a column usage_type. product_id is a primary key id to a table named product.
It is one to many relationship from ...
