如何让SQL中的COUNT(*)飞起来
复制CREATETABLE [dbo].[MobileLink](
[user_id] [varchar](50) NULL,
[item_id] [varchar](50) NULL,
[behavior_type] [varchar](50) NULL,
[user_geohash] [varchar](50) NULL,
[item_category] [varchar](50) NULL,
[time] [varchar](50) NULL
)
1.2.3.4.5.6.7.8.
THE END
