Checking what permissions they have in SQL Server

The function sys.fn_my_permissions is very useful for seeing what permissions you have, but it can be just as useful to check someone else. For this all that is needed is to use EXECUTE AS to impersonate them.

--http://jongurgul.com/blog/checking-permissions-sql-server
CREATE USER Meow WITHOUT LOGIN

SELECT SUSER_NAME() [LoginName],USER_NAME() [DatabaseLoginName];

EXECUTE AS USER = 'Meow'
--EXECUTE AS LOGIN = 'Meow'

SELECT * FROM
(
SELECT SUSER_NAME() [LoginName],USER_NAME() [DatabaseLoginName],2 [Level],ao.[name],p.[permission_name],p.[entity_name],p.[subentity_name]
FROM sys.all_objects ao
CROSS APPLY sys.fn_my_permissions(QUOTENAME(ao.[name]),'OBJECT') p
UNION ALL
SELECT SUSER_NAME() [LoginName],USER_NAME() [DatabaseLoginName],1,db_name () [name],p.[permission_name],p.[entity_name],p.[subentity_name]
FROM sys.fn_my_permissions(NULL, 'DATABASE') p
UNION ALL
SELECT SUSER_NAME() [LoginName],USER_NAME() [DatabaseLoginName],0,@@SERVERNAME,p.[permission_name],p.[entity_name],p.[subentity_name]
FROM sys.fn_my_permissions(NULL, 'SERVER') p
) x
ORDER BY 1,2,3
REVERT

SELECT SUSER_NAME() [LoginName],USER_NAME() [DatabaseLoginName];

DROP USER Meow