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Mysql数据库——向表内插入数据
一、插入元组
数据库:own ->>表:fruit
->>> 数据插入语法:
insert into 表名(列名1, 列名2, 列名3,...) values(列值1,列值2,列值3,...)
备注：列值需要与列名一一对应
示例一：(插入全部数据)
#列名与值一一对应即可，顺序可以与表中的顺序不一致 insert into fruit(id,name,price,num)
values(1,"香蕉",3.11,10);
示例二：(插入部分数据)【根据自己需要的列选择，最常用】
insert into fruit(name,num) values("苹果",10);
示例三：(省略列名插入数据)【默认为所有列插入数据】
#此时必须为4个值，与列一一对应 insert into fruit values(3,"橘子",null,20);
注意点：
(1)非空列必须给数据
(2)自增列可不插入数据
二、插入子查询结果
->>> 数据插入语法:
insert into 表名 子查询结果
示例一：
insert into fruit select * from fruits where price>10;
示例二：
insert into fruit(name,num) select name, num from fruits;
