Question

   select value from students where coll_Id=1
   select value from students where coll_Id=2
   select value from students where coll_Id=3
   select value from students where coll_Id=4
   select value from students where coll_Id=5
   select value from students where coll_Id=6
   select value from students where coll_Id=7
   select value from students where coll_Id=8
   select value from students where coll_Id=9
   select value from students where coll_Id=10

如何为上述语句编写单个查询。

Answer 1

select value from students where coll_Id in (1,2,3,4,5,6,7,8,9,10);

编辑：//见@ t-clausen.dk的问题评论

如果你总是处理范围，你可以使用

select value from students where coll_Id between 1 and 10;

相当于

select value from students where coll_Id >= 1 and coll_id <= 10;

如何编写单个查询以显示多个输入的值

1 个答案: