user表,身份证号码要唯一,手机号码,邮箱要唯一
实现方式:
表结构不用动。一个主键id 加索引实现
如图类型设置索引类型为unique 唯一 选择栏位,命个名就行。索引方式btree 就好。ok啦~
补充:mysql实现多表主键不重复
同一个数据库中有两张表,里面字段都是一样,只是因为存的数据要区分开。但是主键不能重复。具体实现如下:
新建数据库 mytest
新建user表和admin表
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create table ` user ` (
`user_id` int (11) not null ,
`user_name` varchar (255) not null ,
` password ` varchar (255) not null ,
`phone` varchar (255) not null ,
primary key (`user_id`)
)
comment= '用户表'
collate = 'utf8_general_ci'
engine=innodb;
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create table `admin` (
`user_id` int (11) not null ,
`user_name` varchar (255) not null ,
` password ` varchar (255) not null ,
`phone` varchar (255) not null ,
primary key (`user_id`)
)
comment= '管理员表'
collate = 'utf8_general_ci'
engine=innodb;
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新建序列表:
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create table ` sequence ` (
`seq_name` varchar (50) not null ,
`current_val` int (11) not null ,
`increment_val` int (11) not null default '1' ,
primary key (`seq_name`)
)
comment= '序列表'
collate = 'utf8_general_ci'
engine=innodb;
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新增一个序列:
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insert into sequence values ( 'seq_test' , '0' , '1' );
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创建currval函数,用于获取序列当前值:
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delimiter #
create function currval(v_seq_name varchar (50))
returns integer (11)
begin
declare value integer ;
set value = 0;
select current_val into value from sequence where seq_name = v_seq_name;
return value;
end ;
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查询当前值:
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select currval( 'seq_test' );
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创建nextval函数,用于获取序列下一个值:
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delimiter #
create function nextval (v_seq_name varchar (50)) returns integer (11)
begin
update sequence set current_val = current_val + increment_val where seq_name = v_seq_name;
return currval(v_seq_name);
end ;
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查询下一个值
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select nextval( 'seq_test' );
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具体实现:
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< insert id= "adduser" parametertype= "user" >
<selectkey keyproperty= "userid" resulttype= "int" order = "before" >
select nextval( 'seq_test' );
</selectkey>
insert into user (user_id,user_name, password ,phone) values
(#{userid},#{username, jdbctype= varchar },#{ password , jdbctype= varchar }, #{phone, jdbctype= varchar })
</ insert >
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< insert id= "addadmin" parametertype= "admin" >
<selectkey keyproperty= "userid" resulttype= "int" order = "before" >
select nextval( 'seq_test' );
</selectkey>
insert into admin(user_id,user_name, password ,phone) values
(#{userid},#{username, jdbctype= varchar },#{ password , jdbctype= varchar }, #{phone, jdbctype= varchar })
</ insert >
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最终实现:
以上为个人经验,希望能给大家一个参考,也希望大家多多支持服务器之家。如有错误或未考虑完全的地方,望不吝赐教。
原文链接:https://blog.csdn.net/qq_39930369/article/details/86687285