select *，row_number () over (partition by column1 order by column2) as n from tablename 在上面语法中： PARTITION BY子句将结果集划分为分区。

select ROW_NUMBER () over (partition by customerID order by totalPrice) as rows,customerID,totalPrice, DID from OP_Order 4.统计每一个客户最近下的订单是第几次下的订单。

LINQ in .NET returning duplicate rows from a working SQL view [SOLVED] analysis Jun 18, 2013 3 mins Enterprise Applications ...

When you use SELECT in a PL/SQL block, it’s important to make sure that exactly one row will always be returned by your query. If more than one row is returned, the TOO_MANY_ROWS exception occurs.

"Discussion on selecting a ""weighted"" row randomly in MS SQL 2000 for corporate intranet tips section." ...

Coming up to speed with other database management systems and Microsoft's own SQL Azure, row level security is now available in SQL Server.