postgreSQL自动生成随机数值的实例
时间:2021-09-10 10:15:23|栏目:PostgreSQL|点击: 次
1、 随机生成身份证
新建一个函数,用来生成身份证号码,需要输入两个日期参数
create or replace function gen_id( a date, b date ) returns text as $$ select lpad((random()*99)::int::text, 2, '0') || lpad((random()*99)::int::text, 2, '0') || lpad((random()*99)::int::text, 2, '0') || to_char(a + (random()*(b-a))::int, 'yyyymmdd') || lpad((random()*99)::int::text, 2, '0') || random()::int || (case when random()*10 >9 then 'X' else (random()*9)::int::text end ) ; $$ language sql strict;
生成10个随机身份证号码
select gen_id('1900-01-01', '2017-10-16') from generate_series(1,10);
生成十万条随机身份证号码
insert into testpg SELECT generate_series(1,100000) as xm, gen_id('1900-01-01', '2017-10-16') as num;
补充:postgreSql的id设置自动生成随机24位数字与字母组合(uuid)
我就废话不多说了,大家还是直接看代码吧~
@Id @GeneratedValue(generator="system_uuid") @GenericGenerator(name="system_uuid",strategy="uuid") @Column(name = "ID", unique = true, nullable = false, length = 24) public String getId() { return this.id; }
栏 目:PostgreSQL
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