SQL Server 2012 Accidental discovery of small problem solving methods

Before for the auto-generated brackets, always feel that there is no need, until today encountered this small problem, only to find the meaning.

SELECT TOP [_userid]
, [_username]
, [_pwd]
, [_email]
, [_QQ]
from [Haqiu]. [dbo]. [User]

Because I built the name of the table is user, may be the system's keywords, so today I entered the following time has been prompted me error

SELECT * FROM Haqiu.dbo.user

At first I thought it was a permissions problem, and later I found that I could query the data for another table, and then I thought that SQL Server always generated the format with brackets, so I typed in brackets, so the problem was solved. Small problem. Record it, it should be the System key word user.

SQL Server 2012 Accidental discovery of small problem solving methods