《Mysql學(xué)習(xí)PHP之Mysql常用SQL語句示例的深入分析》要點(diǎn)：
本文介紹了Mysql學(xué)習(xí)PHP之Mysql常用SQL語句示例的深入分析，希望對(duì)您有用。如果有疑問，可以聯(lián)系我們。
1.插入數(shù)據(jù)insert into表名(列名1,列名2,列名..) values(值1,值2,值...);?
2.更新數(shù)據(jù)
update 表名set列名1=值1,列名2=值2[where條件];?
update product set name='LiNing', price=50where id=2;?
3.刪除數(shù)據(jù)
deletefrom表名[where條件];?
deletefrom product where id=2;
4.查詢所有數(shù)據(jù)?
select*from表名;select*from product;
5.查詢部份列
select列名1,列名2,列名N from表名;
select name, price from product;
6.條件查詢
# 比較 =, <, >, <=, >=, !=
select*from表名where列名=值;
select*from product where id=2;
# and 與?
select*from表名where條件1and條件2and條件N;?
select*from product where name='Nike'and price=50;
# or 或?
select*from表名where條件1or條件2or條件N;
select*from product where name='Nike'or price>50;?
# not 非?
select*from表名wherenot條件1;
select*from product wherenot name='Nike';?
#in 枚舉?
select*from表名where列名in(值1,值2,值N);?
select*from product where id in(2,3,4,10);?
select*from product where id notin(2,3,4,10);?
#like 模糊查詢?
select*from表名where列名 like '%值%';?
select*from product where name like '%Li%';?
#between...and... 范圍查詢?
select*from表名where列名 between 值and值;?
select*from order where created between '2010-01-01'and'2011-01-01';
7.查詢排序
select*from表名 order by列名排序方式;
#排序方式: asc(升序,默認(rèn)),desc(降序)?
select*from product order by created desc;
8.限制查詢結(jié)果數(shù)量
select*from表名 limit 開始記錄數(shù),結(jié)果數(shù)量;select*from product limit 5;
select*from product limit 2,5;
9.聚合函數(shù)
# count 總記錄數(shù)?
select count(列名)from student;?
select count(id)from student;?
# sum 總共?
select sum(列名)from student;?
select sum(age)from student;?
# avg 平均值?
select avg(列名)from student;
select avg(age)as avg_age from student;?
# max 最大值?
select max(列名)from student;?
select max(age)from student;?
# min 最小值?
select min(列名)from student;?
select min(age)from student;
10.子查詢
select name from student where age<(select avg(age)from student );?
select*from product where id in(select id from order );
11.連接查詢
select s.username as stu_name, t.name as te_name from student s, teacher t where s.teacher_id=t.id;
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