請問Compute是什么 后面的by是什么意思，不懂1.?假設(shè)表orderitem有列orderid(int類型)和列thenumber(int類型)，則下列語句可以正確執(zhí)行的是（選一項）A、Select * from orderitem where orderid<=2 order by orderidCompute sum(thenumber) by orderidB、Select * from orderitem where orderid<=2Compute sum(thenumber) by orderidC、Select * from orderitem where orderid<=2 order by thenumberCompute sum(thenumber) by orderidD、Select * from orderitem where orderid<=2 order by orderidCompute sum(orderid) by thenumber?
sql server的小題，請解答
山水郎2015
2016-04-25 22:14:07
