mysql資料庫實驗7

3． 在xs表中查詢學號為081104和學號為081221的兩位同學的資訊。

select  學號,姓名,專業名,性別,出生日期,總學分

from xs
where 學號=
'081104'
union
select 學號,姓名,專業名,性別,出生日期,總學分
from xs
where 學號=
'081221'
;

use xscj

handler kc open;
handler kc read first
where 學分》4;
handler kc read next;
handler kc close;

select  學號,姓名,專業名,性別,出生日期,總學分

from xs
where 姓名=
'李明'
union
select 學號,姓名,專業名,性別,出生日期,總學分
from xs
where 姓名=
'李計'
;

use xscj

handler xs_kc open;
handler xs_kc read first
where 成績》=90;
handler xs_kc read next;
handler xs_kc close;

select  employeeid,name,education,birthday,***,workyear,address

from employees
where employeeid=
'020010'
union
select employeeid,name,education,birthday,***,workyear,address
from employees
where employeeid=
'102208'
;

use yggl

handler salary open;
handler salary read first
where income>=
2500
;handler salary read next;
handler salary close;

select max

(income-outcome)
as'最高實際收入'
,min
(income-outcome)
as'最低實際收入'
from salary
where employeeid in
(select employeeid from employees 
where departmentid =
(select departmentid from departments 
where departmentname=
'財務部'))
;

select *

from 
employees,salary
where salary.employeeid =employees .employeeid
and income>
2500
;

select employeeid,name,education,address

from employees
where employeeid like'%2__'
;

select employeeid,name

from employees
where departmentid =
(select departmentid from departments 
where departmentname=
'研發部'
);

select *

from employees
where departmentid=
(select departmentid from departments 
where departmentname=
'財務部'
)union
select *
from employees
where departmentid=
(select departmentid from departments 
where departmentname=
'研發部'
);

select *

from employees
where workyear >
all(select workyear from employees where departmentid in
(select departmentid from departments where departmentname =
'研發部'))
;

select  employeeid,name,education,birthday,***,workyear,address

from employees
where education=
'本科'
union
select employeeid,name,education,birthday,***,workyear,address
from employees
where education=
'碩士'
;

(select *

from employees
where education=
'本科'
order by workyear desc
limit 3
)union all
(select *
from employees
where education=
'碩士'
order by workyear desc
limit 1
);

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