mysql怎么写题 写出一句完整的mysql语句

mysql题目,这个题怎么写?

select A.tid,A.tname,count(b.cid) from teacher A,course b,tcourse C

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where A.tid=C.tid

and b.cid=C.cid

group by A.tid,A.tname

order by count(b.cid) desc

mysql 面试题,如下,怎么写??

select date as "日期",

sum(decode(area,'海淀',value,0)) as "海淀统计数",

sum(decode(area,'朝阳',value,0)) as "朝阳统计数",

sum(value) as "总数"

from a

group by date

谁知道这道关于mysql的题怎么做?

create database exam;

grant all privileges on *.* to test@"%" identified by "123456";

use exam;

create table product(id int(4) auto_increment not null , name char(10) not null ,price int(4), sdate date);

insert into product(name,price,sdate) values("计算机",5000,"2006-8-8");


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