1.正则表达式写法: CREATE OR REPLACE FUNCTION Func_checkidcard (p_idcard IN VARCHAR2) RETURN INT IS v_regstr ); v_sum NUMBER; v_mod NUMBER; v_checkcode ) := '10X98765432'; v_checkbit ); v_areacode ) := '11,12,13,14,15,21,22,23,31,32,33,34,35,36,37,41,42,43,4