摘要:
select id , case id when 1001 then '第一类' when 1002 then '第二类' else '第三类' end ' 类别 'from dept; 阅读全文
摘要:
package test;import demon.Person;class Tuple<A, B> { public final A first; public final B second; public Tuple(A a, B b) { first = a; second = b; } pu 阅读全文