根据身份证号码更新性别 oracle SQL

2019独角兽企业重金招聘Python工程师标准>>>

最近处理的系统中出现了大量重复数据，身份证号和姓名一样。而身份证号是作为用户登录系统的用户名，这样如果用户修改了密码，就有可能出现登录不了的情况。

1 delete from where not in
2 ( select max from group by

备份其它的语句:
根据身份证号码更新用户的的性别信息：

update users set gender='男' where length(idcard)=18 and substr(idcard, 17, 1) in ('1','3','5','7','9')

update users set gender='Ů' where length(idcard)=18 and substr(idcard, 17, 1) in ('0','2','4','6','8')

update users set gender='男' where length(idcard)=15 and substr(idcard, 15, 1) in ('1','3','5','7','9')

update users set gender='Ů' where length(idcard)=15 and substr(idcard, 15, 1) in ('0','2','4','6','8')

select t.idcard, t.gender from users t

更新人员的身份证号码信息：

update set = substr(cardid, 0 , 17 ) || ' X ' where like ' %x ' and = ' 居民身份证 ' and = 18

使用A表的数据更新B表的对应数据：

update set = select as
from where =
where exists ( select 1 from where = t_e1.eneeid)

转载于:https://my.oschina.net/usenrong/blog/197815

文章来源: https://blog.csdn.net/weixin_34194087/article/details/92028962