概述

有個朋友說能不能用函數來實現對身份證的校驗，所以這裡用Oracle的函數來實現，其他資料庫異曲同工..

身份證校驗函數

CREATE OR REPLACE FUNCTION Func_checkidcard (p_idcard IN VARCHAR2) RETURN INTIS  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                              -- 15位     IF INSTRB (v_areacode, SUBSTR (p_idcard, 1, 2) || ',') = 0 THEN      RETURN 0;     END IF;      IF MOD (TO_NUMBER (SUBSTRB (p_idcard, 7, 2)) + 1900, 400) = 0      OR      (        MOD (TO_NUMBER (SUBSTRB (p_idcard, 7, 2)) + 1900, 100) <> 0        AND        MOD (TO_NUMBER (SUBSTRB (p_idcard, 7, 2)) + 1900, 4) = 0      )     THEN                             -- 閏年      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                               -- 18位     IF INSTRB (v_areacode, SUBSTRB (p_idcard, 1, 2) || ',') = 0 THEN      RETURN 0;     END IF;          IF MOD (TO_NUMBER (SUBSTRB (p_idcard, 7, 4)), 400) = 0      OR      (        MOD (TO_NUMBER (SUBSTRB (p_idcard, 7, 4)), 100) <> 0        AND        MOD (TO_NUMBER (SUBSTRB (p_idcard, 7, 4)), 4) = 0      )     THEN                             -- 閏年      v_regstr :=        '^[1-9][0-9]{5}(19|20)[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]$';     ELSE      v_regstr :=        '^[1-9][0-9]{5}(19|20)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$';     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 = upper(substrb(p_idcard,18,1)) THEN        RETURN 1;      ELSE        RETURN 0;      END IF;     ELSE      RETURN 0;     END IF;   ELSE     RETURN 0;  -- 身份證號碼位數不對  END CASE;EXCEPTION  WHEN OTHERS  THEN   RETURN 0;END fn_checkidcard;/Show Err;

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