说明:复制表(只复制结构,源表名:a 新表名:b) select * into b from a where 11
说明:拷贝表(拷贝数据,源表名:a 目标表名:b)insert into b(a, b, c) select d,e,f from b;
说明:显示文章、提交人和最后回复时间select a.title,a.username,b.adddate from table a,(select max(adddate) adddate from table where table.titl