多列子查询少了个','号
我用的是MSSQL，最近用了多列子查询，出错了。
位置在WHERE (ShipRegion,ShipCountry)这个地方
(服务器: 消息 170，级别 15，状态 1，行 2
第 2 行: ',' 附近有语法错误。)：
select * from Orders
WHERE (ShipRegion,ShipCountry)
IN (SELECT ShipRegion,ShipCountry FROM Orders)
[解决办法]
分开写不行吗？
select * from Orders
WHERE ShipRegion IN (SELECT ShipRegion FROM Orders) and ShipCountry in (select ShipCountry FROM Orders)
