EXISTS ,IN usage without SELECT ,INSERT and UPDATE queries
120837
Difference between EXISTS and IN in SQL?
129385
How to check if a column exists in a SQL Server table?
83110
JOIN versus EXISTS performance
78777
Oracle: how to UPSERT (update or insert into a table?)
158208
PostgreSQL execute a default query when no row are returned
36454
Can you use an alias in the WHERE clause in mysql?
52570
How to do an update + join in PostgreSQL?
13261
Return row only if value doesn't exist
99286
Access: create table if it does not exist
128783
How to save select query results within temporary table?
117531
Best practice between using LEFT JOIN or NOT EXISTS
136992
"Insert if not exists" statement in SQLite
102293
INSERT INTO if not exists SQL server
145241
Using an ORM or plain SQL?
18879
How to set a default row for a query that returns no rows?
150261
Alternative to File.exists() in Java
18724
Find a value anywhere in a database