Postgresql extremely slow count (with index, simple query)
48294
"Recheck Cond:" line in query plans with a bitmap index scan
143004
sys.dm_db_index_physical_stats is extremly slow
63636
Lock time not involved in MySQL slow query selection?
11569
INSERT takes over 5 hours, when inserting more than specific number of rows
133376
Optimizing a simple mysql select on a large table (75M+ rows)
60555
How to count occurrences of a column value efficiently in SQL?
65713
Update by iterating table in batches faster than whole table in PostgreSQL
96731
SQL Server: Query fast, but slow from procedure
46470
Can MySQL reasonably perform queries on billions of rows?
146164
Speeding up a NOT IN subquery
107211
How to dive into the PostgreSQL's optimizer and trace each step it takes to optimize the query?
137483
How to get number of rows affected, while executing MySQL query from bash?
52039
Does adding 'LIMIT 1' to MySQL queries make them faster when you know there will only be 1 result?
89905
Have I actually found a real bug in PostgreSQL?
28866
How does MySQL process ORDER BY and LIMIT in a query?
99497
IF EXISTS taking longer than embedded select statement
148599
"Column count doesn't match value count at row" but it does