Question : I’m running into some trouble with SQL: Basically I’m trying to get a result set back that contains […]
Tag: subquery
MySQL unknown column in subquery
Question : I’m running a fantasy game where the ratings for each player are calculated in the following way: Each […]
How to speed up subquery
Question : Let’s suppose we have: select o_orderpriority, count(*) as order_count from orders where o_orderdate>=’01/07/1993’and o_orderdate<’01/10/1993′ and exists (select * […]
Joining two tables by the nearest match
Question : General problem: I want to do a left join on two huge tables, but there is no matching […]
How to select events based an adjacent times?
Question : I have a table rooms which contains information regarding events that take in rooms. This is the definition […]
Finding posts with exactly set of tags per user
Question : I’m trying to determine the best way to find all posts that have an exact match with a […]
Poor performing subquery with date comparisons
Question : When using a subquery to find the total count of all prior records with a matching field, the […]
Why Output is wrong after doing the left join as subquery
Question : I have TWO QUERY which work perfect, but when i join those two query as LEFT JOIN the […]
Using OFFSET in a large table by a simple sub-query
Question : The slow performance for using OFFSET in large table has been widely discussed in various blogs, and the […]
Can data changes become visible between a subquery and an outer statement in PostgreSQL?
Question : I have a PostgreSQL query that looks like this: DELETE FROM x WHERE x.id NOT IN (SELECT x_id […]