SQL Error Severity and Level Cheat Sheet

Sometimes I have to raise errors manually inside a stored procedure. It will be handy to have an error severity cheat sheet.

Code	Description
1 - 9	Informational messages/warnings.
10	N/A. @@ERROR won't be set.
11 - 16	Regular programming errors. Level 16 is not more serious than 11
11	Specified Database Object Not Found
12	Unused
13	User Transaction Syntax Error. E.g. deadlock.
14	Insufficient Permission
15	Syntax Error in SQL Statements
16	Miscellaneous User Error
17	Run out of a configurable resource, such as locks
18	Nonfatal internal software problems
19	Nonconfigurable resource limit has been exceeded
20	An error with a statement issued by the current process
21	SQL Server has encountered a problem that affects all the processes in a database
22	A table or index has been damaged
23	The integrity of the entire database is affected and the database will be marked suspect
24	Hardware problem
25	System error