--身份证号校验位算法： 1：把前17位号码从第高位到低位与下列17个数字分别相乘求和（N）： 『2,4,8,5,10,9,7,3,6,1,2,4,8,5,10,9,7』 比如身份证号码为：C1C2C3……C16C17 则N＝C17×2＋C16×4＋……＋C1×7； 2：将N除以11取余数R，根据余数计算校验位T： 1）如果R＝0，则T＝1；如果R＝1，则T＝0；如果R＝2，则T＝X； 2）如果R＝3，则T＝9；如果R＝4，则T＝8；依此类推……；如果R＝10，则T＝2；-- 0代表身份证不合法，1代表身份证合法create or replace function CHECK_IDCARD(p_idcard varchar2) return number is v_regstr VARCHAR2 (2000); v_sum NUMBER; v_mod NUMBER; v_checkcode CHAR (11) := '10X98765432'; v_checkbit CHAR (1); v_areacode VARCHAR2 (2000) := '11,12,13,14,15,21,22,23,31,32,33,34,35,36,37,41,42,43,44,45,46,50,51,52,53,54,61,62,63,64,65,71,81,82,91,';BEGIN CASE LENGTHB (p_idcard) WHEN 15 THEN -- 验证15位身份证 IF INSTRB (v_areacode, SUBSTR (p_idcard, 1, 2) || ',') = 0 THEN RETURN 0; END IF; IF MOD (TO_NUMBER (SUBSTR (p_idcard, 7, 2)) + 1900, 400) = 0 OR ( MOD (TO_NUMBER (SUBSTR (p_idcard, 7, 2)) + 1900, 100) <> 0 AND MOD (TO_NUMBER (SUBSTR (p_idcard, 7, 2)) + 1900, 4) = 0 ) THEN -- 闰年 v_regstr := '^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$'; ELSE v_regstr := '^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$'; END IF; IF REGEXP_LIKE (p_idcard, v_regstr) THEN RETURN 1; ELSE RETURN 0; END IF; WHEN 18 THEN --验证 18位身份证 IF INSTRB (v_areacode, SUBSTR (p_idcard, 1, 2) || ',') = 0 THEN RETURN 0; END IF; IF MOD (TO_NUMBER (SUBSTR (p_idcard, 7, 4)), 400) = 0 OR ( MOD (TO_NUMBER (SUBSTR (p_idcard, 7, 4)), 100) <> 0 AND MOD (TO_NUMBER (SUBSTR (p_idcard, 7, 4)), 4) = 0 ) THEN -- 闰年 v_regstr := '^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$'; ELSE v_regstr := '^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$'; END IF; IF REGEXP_LIKE (p_idcard, v_regstr) THEN v_sum := ( TO_NUMBER (SUBSTRB (p_idcard, 1, 1)) + TO_NUMBER (SUBSTRB (p_idcard, 11, 1)) ) * 7 + ( TO_NUMBER (SUBSTRB (p_idcard, 2, 1)) + TO_NUMBER (SUBSTRB (p_idcard, 12, 1)) ) * 9 + ( TO_NUMBER (SUBSTRB (p_idcard, 3, 1)) + TO_NUMBER (SUBSTRB (p_idcard, 13, 1)) ) * 10 + ( TO_NUMBER (SUBSTRB (p_idcard, 4, 1)) + TO_NUMBER (SUBSTRB (p_idcard, 14, 1)) ) * 5 + ( TO_NUMBER (SUBSTRB (p_idcard, 5, 1)) + TO_NUMBER (SUBSTRB (p_idcard, 15, 1)) ) * 8 + ( TO_NUMBER (SUBSTRB (p_idcard, 6, 1)) + TO_NUMBER (SUBSTRB (p_idcard, 16, 1)) ) * 4 + ( TO_NUMBER (SUBSTRB (p_idcard, 7, 1)) + TO_NUMBER (SUBSTRB (p_idcard, 17, 1)) ) * 2 + TO_NUMBER (SUBSTRB (p_idcard, 8, 1)) * 1 + TO_NUMBER (SUBSTRB (p_idcard, 9, 1)) * 6 + TO_NUMBER (SUBSTRB (p_idcard, 10, 1)) * 3; v_mod := MOD (v_sum, 11); v_checkbit := SUBSTRB (v_checkcode, v_mod + 1, 1); IF v_checkbit = SUBSTRB (p_idcard, 18, 1) THEN RETURN 1; ELSE RETURN 0; END IF; ELSE RETURN 0; END IF; ELSE RETURN 0; -- 身份证号码位数不对 END CASE;EXCEPTION WHEN OTHERS THEN RETURN 0;end CHECK_IDCARD;
