怎么优化SQL语句

如何优化SQL语句？

C# code

select * from news where id=1 or id=2 or id=4 or id=18 or id=22 or id=33

SQL code

select * from news where id=1 union allselect * from news where id=2union allselect * from news where id=4union allselect * from news where id=18union allselect * from news where id=22union allselect * from news where id=33