IF NOT EXISTS (SELECT 1 FROM sys.objects WHERE object_id = OBJECT_ID('[dbo].[user]') AND type = 'U')
CREATE TABLE [dbo].[user]
(
    [account] varchar(50) COLLATE Chinese_PRC_CI_AS NULL DEFAULT(''),
    [mobile] varchar(50) COLLATE Chinese_PRC_CI_AS NULL DEFAULT(''),
    [pass] varchar(50) COLLATE Chinese_PRC_CI_AS NULL DEFAULT(''),
)