表結構

1.查詢名人表中性別是男的作者

select * from celebrity where ssex='男';

2.查詢靜夜思的作者

select c.sname from summary as s inner join celebrity as c on s.sid=c.sid inner join works as w on s.wid = w.wid where w.wwork='靜夜思';

3.查詢李白和杜甫的年紀

select sname,sage from celebrity where sname in ('李白','杜甫');

4.查詢名人表中的男女人數

select count(*),ssex from celebrity group by ssex;

5.查詢白居易寫的作品名稱和對應的名句

select c.sname,w.wwork,s.sassess from summary as s inner join celebrity as c on s.sid=c.sid inner join works as w on s.wid=w.wid where c.sname='白居易';

6.查詢年紀在25-30歲之間的個數

select count(*) from celebrity where sage between 25 and 30;

7.查詢名人表中年紀最小的兩條信息

select * from celebrity order by sage limit 0,2;

8.查詢李白的作品名稱，名句和年紀

select w.wwork,s.sassess,c.sage from summary as s inner join works as w on s.wid=w.wid inner join celebrity as c on s.sid=c.sid where sname='李白';

9.將作品為望岳的朝代修改為北宋

update works set wdynasty='北宋' where wwork='望岳';

10.新增名人表中的一個作者王維，年紀25，性別男

insert into celebrity values(7,'王維',25,'男');

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