面试的题自己记录一下
答案也在下面 方便参考
1.
select
class,
max(score)as maxscore
from table1 group by class order by maxscore
2.
SELECT
s.name,
s.course,
s.score
FROM student s WHERE s.name LIKE '张%'
GROUP BY s.name
HAVING AVG(score) > 75
3.
SELECT
ID
FROM student2
WHERE A > 60 AND B > 60 AND C > 60 AND D > 60 AND E > 60
GROUP BY ID
HAVING SUM(A+B+C+D+E) > 600
4.
SELECT
t.name,
t.com_name,
t.number
FROM table2 t
WHERE t.number > 1
5.
SELECT
C1,
SUM(C2)
FROM table3 GROUP BY C1
6.
SELECT * FROM(
SELECT COUNT(*)AS '及格' FROM t2 WHERE person >60
)a
INNER JOIN
(
SELECT COUNT(*)AS '不及格' FROM t2 WHERE person <=60
)b
CREATE TABLE IF NOT EXISTS t2(
id VARCHAR (20),
person VARCHAR (10)
)
INSERT INTO `t2` VALUES('199801001','85'),
('199801002','76'),
('199801003','98'),
('199801004','54'),
('199801005','39'),
('199801006','61')
CREATE TABLE IF NOT EXISTS table3(
C1 VARCHAR (20),
C2 VARCHAR (10)
)
INSERT INTO `table3` VALUES('2005-01-01','1'),
('2005-01-01','3'),
('2005-01-02','5'),
CREATE TABLE IF NOT EXISTS table2(
`name` VARCHAR (10) ,
com_name VARCHAR (10),
number VARCHAR (4)
)
INSERT INTO `table2` VALUES('A','甲','2'),
('B','乙','4'),
('C','丙','1'),
('A','丁','2'),
('B','丙','5')
CREATE TABLE IF NOT EXISTS student2(
`ID` VARCHAR (10) ,
A VARCHAR (4),
B VARCHAR (4),
C VARCHAR (4),
D VARCHAR (4),
E VARCHAR (4)
)
insert into `student2` VALUES('2006002','149','105','110','142','129');
CREATE TABLE IF NOT EXISTS student(
`name` VARCHAR (5) COMMENT '学生姓名',
course VARCHAR (4),
score VARCHAR (4)
)ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1;
insert into `student` VALUES('王华','数学','72')，
insert into `student` VALUES('张华','英语','81')，
insert into `student` VALUES('张青','物理','67')，
insert into `student` VALUES('李立','化学','98')，
insert into `student` VALUES('张燕','物理','70')，
insert into `student` VALUES('张青','化学','76');
insert into student values('张青','语文','72');