SQL 语句中, asc是指定列按升序排列,desc则是指定列按降序排列 select * from tt order by n2 asc ![]() select * from tt order by n2 desc ![]() |
SQL 语句中, asc是指定列按升序排列,desc则是指定列按降序排列 select * from tt order by n2 asc ![]() select * from tt order by n2 desc ![]() |
SQL Server 的语法: SELECT TOP number|percent column_name(s)FROM table_name 等...
一、问答题 1、数据库包含哪些哪几种后缀名的文件必须,这些...