handle limit and offset correctly

[Samael]

SQLite:

SELECT * FROM users 
    [ ORDER BY ... ]
    LIMIT 4,3 -- offset is optional so could do LIMIT 4

Postgres:

SELECT * FROM users
    [ ORDER BY ... ]
    [ LIMIT { number | ALL } ] [ OFFSET number ]

MS SQL Server:

SELECT * FROM users
    [ ORDER BY ... ]
    OFFSET 2 ROWS 
    FETCH 5 ROWS -- can also do SELECT TOP n * FROM...

[Samael]

done