SQL的聚合函数与排序

desc

order by指排序的列，也可以是select后面指定的列名

order by 子句应位于select 语句的结尾

Select name, math from stu order by math;
select name, math+english+chines from stu order by math+english+chines desc;
select name, math+english+chines from stu where name like 'zhang%' order by math+english+chines desc;

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