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Mysql實(shí)例MySQL筆記之基本查詢的應(yīng)用詳解

作者：VEPHP   時(shí)間 2017-09-28

《Mysql實(shí)例MySQL筆記之基本查詢的應(yīng)用詳解》要點(diǎn)：
本文介紹了Mysql實(shí)例MySQL筆記之基本查詢的應(yīng)用詳解，希望對您有用。如果有疑問，可以聯(lián)系我們。

MYSQL實(shí)例參考表：student

MYSQL實(shí)例Mysql實(shí)例MySQL筆記之基本查詢的應(yīng)用詳解

多字段查詢

代碼如下:

mysql> select id,name,birth from student;


所有字段查詢
代碼如下:

mysql> select * from student;


where指定查詢
代碼如下:

mysql> select * from student where id=901;
mysql> select * from student where id>=904;
mysql> select name from student where department='計(jì)算機(jī)系';


in指定集合查詢
代碼如下:

mysql> select * from student where birth in(1988,1990);
mysql> select * from student where id in(903,906);

not in非范圍查詢
代碼如下:

mysql> select * from student where birth not in(1990,1998);


between and指定范圍查詢
代碼如下:

mysql> select * from student where birth between 1986 and 1988;


not between and不在指定范圍的查詢
代碼如下:

mysql> select * from student where id not between 904 and 906;


like字符串匹配查詢
代碼如下:

mysql> select * from student where name like '_三';
mysql> select * from student where name like '張三';
mysql> select * from student where name like '張%';


not like不匹配查詢
代碼如下:

mysql> select * from student where name not like '張%';


null查詢
代碼如下:

mysql> select * from student where address is null;


and多條件查詢
代碼如下:

mysql> select * from student where name like '張%' and birth>1985;
mysql> select * from student where name like '張%' and birth>1985 and id like '%3';


or多條件查詢
代碼如下:

mysql> select * from student where id=905 or birth=1988;
mysql> select * from student where id=905 or birth=1988 or sex='女';

MYSQL實(shí)例distinct查詢結(jié)果不重復(fù)

代碼如下:

mysql> select distinct sex from student;
mysql> select distinct department from student;


order by查詢結(jié)果排序
代碼如下:

mysql> select * from student order by birth;
mysql> select * from student order by birth asc;
mysql> select * from student order by birth desc;


group by分組查詢
代碼如下:

mysql> select sex,group_concat(name) from student group by sex;
mysql> select sex,count(name) from student group by sex;


正則表達(dá)式查詢
代碼如下:

mysql> select * from student where birth regexp '1988|1990';


limit限制查詢結(jié)果數(shù)量
代碼如下:

mysql> select * from student limit 2;
mysql> select * from student limit 1,3;


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