-- 方式一：插入指定字段數(shù)據(jù)（推薦使用）
insert into 表名 [(字段列表)] values (對(duì)應(yīng)列數(shù)據(jù));
-- 方式二：插入所有字段對(duì)應(yīng)的數(shù)據(jù)
insert into 表名 values (對(duì)應(yīng)列數(shù)據(jù));

create table tb_teacher(
 name varchar(10),
 age int
);
-- 插入一條數(shù)據(jù)
insert into tb_teacher (name, age) values ('Jack', 24);

-- 字段名和值需要一一對(duì)應(yīng)
insert into tb_teacher (age, name) values (25, 'Tom');

-- 可以只插入部分字段數(shù)據(jù)
insert into tb_teacher (name) values ('Steve');

-- 插入全部字段對(duì)應(yīng)的數(shù)據(jù),此時(shí)值列表需要對(duì)應(yīng)表結(jié)構(gòu)
insert into tb_teacher values ('Jery', 23);

-- 查詢表中全部字段數(shù)據(jù)
select * from 表名;
-- 查詢表中部分字段數(shù)據(jù)
select 字段列表 from 表名;
-- 簡(jiǎn)單條件查詢數(shù)據(jù)
select 字段列表/* from 表名 where 字段名 = 值;

-- 查詢所有數(shù)據(jù)
select * from tb_teacher;
+-------+------+
| name  | age  |
+-------+------+
| Jack  |   24 |
| Tom   |   25 |
| Steve | NULL |
| Jery  |   23 |
+-------+------+
-- 指定字段
select name from tb_teacher;
+-------+
| name  |
+-------+
| Jack  |
| Tom   |
| Steve |
| Jery  |
+-------+
-- 限制條件, 年齡==23
select name from tb_teacher where age = 23;
+------+
| name |
+------+
| Jery |
+------+

-- 如果沒有條件，會(huì)刪除所有數(shù)據(jù)
delete from 表名 [where 條件];

-- 刪除年齡為23的數(shù)據(jù)
delete from tb_teacher where age = 23;
select * from tb_teacher;
+-------+------+
| name  | age  |
+-------+------+
| Jack  |   24 |
| Tom   |   25 |
| Steve | NULL |
+-------+------+

-- 如果沒有where條件，將會(huì)更新表中所有的值
update 表名 set 字段名 = 新值 [where 條件];

-- 更新Tom的年齡為26
update tb_teacher set age = 26 where name = 'Tom';
select * from tb_teacher;
+-------+------+
| name  | age  |
+-------+------+
| Jack  |   24 |
| Tom   |   26 |
| Steve | NULL |
+-------+------+