oracle下常用查询更新命令(身份证号判断男女,更新语句多表查询)

1.update数据

UPDATE VOL_BASEINFO b
SET (b.vlbi_zzmmm, b.vlbi_mzm) = (select t.zz,t.mz from MY_ZHB_2014 t where t.xh= b.vlbi_xh)
where b.vlbi_xh like ‘14%‘;

2.根据身份证号判断男女

decode(mod(to_number(substr(‘身份证号‘, 17, 1)), 2), 0, ‘2‘, ‘1‘)a.先截取身份证的倒数第二位数字b.被2整除c.如果余数是0,则为2-女d.如果余数是不为0,则为1-男

select decode(mod(to_number(substr(‘身份证号‘, 17, 1)), 2), 0, ‘2‘, ‘1‘)
from dual