DDL是SQL定义语言,它主要包括三个关键字:create  ,alter , drop(数据库关键字不分大小写 ),主要操作对象 有数据库、表、索引、视图等

操作                      语句

创建数据库        create database

修改数据库        alter  database

删除数据库        drop   database

创建表              create   table

修改表              alter      table

删除表              drop      table

创建所以           create   index

删除索引           drop      index

...........           ....................

1.create

创建数据库、表、所以、视图等操作。

例子:常见一个人事表,包括字段(一个字段就是表里一列,它也是人的一个属性)有 ID,姓,名, 地址,城市。


use scott
create table person (
id int primary key ,
lastname char(10),
firstname char(10),
addres char(20),
city char(20)
)

上述指令表示在scott 数据库下面创建person表,其中person表有5个字段,id 为主键,主键的意思是能唯一标识一行记录,就像人的身份证是不同的,它能唯一标识出一个人。

通过语句

select * from  person

aaarticlea/png;base64,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" alt="" />

可以看出创建的person表,这样表的每一行就表示一个人的记录了,目前表里啥也没有,细心观察我们发现,表里每个人是缺少联系方式的

,所以我们可以网表里在添加个人联系方式,包括邮箱,电话,其中电话分手机和家庭电话。所以一共需要在添加3个字段。

2.alter

修改原有表的结构。

添加字段是属于修改表的结构,要用到DDL语言,运用关键字ALTER实现。

ALTER  table person add mail char(30),family_phone int,tel int  

ALTER ....  add  连用实现对表添加列操作。

使用

select * from person 

查看运行结果为

aaarticlea/png;base64,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" alt="" />

已成功添加了三个字段。

注意:随着语句的增多,不能再一个查询窗口下面直接按F5执行语句,如下图所示

aaarticlea/png;base64,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" alt="" />

语句很多,如果我们想执行图中蓝色突出部分查询语句,我们可以鼠标左键按住选中,鼠标右键下拉菜单选择执行命令,也可以选中之后按住F5快捷键来执行。

alter  add 为表增加列,如果要删除列呢,则使用alter  drop 进行操作。 上面我们增加的三个字段中,其实家庭电话号码没必要增加,有邮箱和个人电话号码就行了,现在我们发现家庭号码多余了,所以把家庭号码在已有表中删除。

alter table person drop column family_phone
select * from person

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" 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注意删除列和添加列稍微有差别。

 ALTER table person add mail char(30),family_phone int,tel int
ALTER table person drop column family_phone
drop column family_phone

添加列ADD后面直接跟列名,如上面代码第一行所示,add 后面直接跟mail。但是第二行中drop 后面跟了column关键字的约束,表明删除的是列 ,然后 drop 删除列时必须与alter连用。上面第3行语句执行错误,

如果需要修改列的类型,也可以使用alter + alter 组合

alter table table_name alter column column_name datatype

3.drop

删除数据库、表、索引。

drop database  database_name

drop  table table_name(表的结构、属性以及索引也会被删除)

drop index index_name on  table_name

小结,DDL是对数据库、表、视图、索引的创建、修改、删除等操作,包括三个重要关键字create、alter和 drop。

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