生产环境中Oracle常用函数总结

1>to_char,将日期转换为字符；add_months,在第一个参数的日期上加或者减第二个参数的值

select dkzh,jkhtbh,yhkrq,dkffrq,shqs,dqyqcs,to_char(add_months(dkffrq,shqs+dqyqcs+1),'yyyymm') from grdk_dk_zz a where a.dkzt in('02','03') and jgbm like '01'||'%' and to_char(a.yhkrq,'yyyymm')<>to_char(add_months(a.dkffrq,a.shqs+a.dqyqcs+1),'yyyymm');