sql语句应用

       laravel5.6框架中用到的sql语句

        //排序
        $data=DB::table('admin')->select(array('id','name','password'))->orderBy('name')->get();
        //去除重复数据
        $data=DB::table('admin')->select('name')->distinct('name')->get();
        //分组
        $data=DB::table('admin')->select(array('id','name','password'))->get()->groupBy('name');
        //获取限定条件以外的数据
        $data = DB::table('admin')->offset(10)->limit(5)->get();
        $data = DB::table('admin')->skip(10)->take(5)->get();
        //限定
        $data = DB::table('admin')->limit(5)->get();
        $data = DB::table('admin')->take(5)->get();

      sql源生语句

//去除重复数据
select distinct (name) from admin
//分组
select * from tablename group by name,age
//清空表记录
truncate table tablename    清空表记录，id重置
//分组统计数据
SELECT site_id,SUM(access_log.count) AS nums from access_log GROUP BY site_id;
//根据字段排序
select * from access_log ORDER BY date
//统计
SELECT SUM(count) as sum from access_log
//获取最大值
SELECT max(access_log.count) as sum from access_log
//获取最小值
SELECT min(access_log.count) as sum from access_log