oracle实现身份证校验功能（Oracle to achieve authentication card function）.docVIP

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oracle实现身份证校验功能（Oracle to achieve authentication card function）.doc

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oracle实现身份证校验功能（Oracle to achieve authentication card function）

oracle实现身份证校验功能（Oracle to achieve authentication card function） Requirements: 1, enter a 18 digit ID number, to verify its effectiveness; The 2 part is the effective date of birth and date and eighteenth bit parity bit is correct is legitimate. ID number parity algorithm: 1: the first 17 numbers from the high to low and the following 17 digits are multiplied by the sum (N): 2,4,8,5,10,9,7,3,6,1,2,4,8,5,10,9,7. For example, ID number: C1C2C3...... C16C17 N = C17 * 2C16 * 4...... C1 * 7; 2: N will be divided by 11 mod R, calculate the parity bit according to the remainder of T: 1) if R = 0, T = 1; if R = 1, T = 0; if R = 2, T = X; 2) if R = 3, T = 9; if R = 4, T = 8 and so on...... ; if R = 10, T = 2; SET SERVEROUTPUT ON CREATE OR REPLACE PROCEDURE CHECK_CARD (p_card_number VARCHAR2) AS L_card_number VARCHAR2 (20); L_card_last VARCHAR2 (2); L_card_str VARCHAR2 (8); L_judge_str VARCHAR2 (20); L_judge_r VARCHAR2 (2); L_judge_t VARCHAR2 (2); L_count number (6); L_card_date date; BEGIN L_card_number:=trim (p_card_number); L_card_last:=trim (substr (l_card_number, 18,1)); L_judge_str:=trim (2485109736124851097); L_card_str:=trim (substr (l_card_number, 7,8)); L_card_date:=trim (to_date (l_card_str,yyyymmdd)); If length (l_card_number) 18 then Dbms_output.put_line (ID number is wrong, please input the ID number 18! ); Else L_count:= (substr (l_card_number, 17,1) * substr (l_judge_str, 1,1) + Substr (l_card_number, 16,1) * substr (l_judge_str, 2,1) + Substr (l_card_number, 15,1) * substr (l_judge_str, 3,1) + Substr (l_card_number, 14,1) * substr (l_judge_str, 4,1) + Substr (l_card_number, 13,1) * substr (l_judge_str, 5,2) + Substr (l_card_number, 12,1) * substr (l_judge_str, 7,1) + Substr (l_card_number, 11,1) * substr (l_judge_str, 8,1) + Substr (l_card_number, 10,1) * substr (l_judge_str, 9,1) + Substr (l_card_number, 9,1) * substr (l_judge_str, 10,1) + Substr (l_card_number, 8,1) * substr (l_judge_str, 11,1) + Substr (l_card_number, 7,1) * substr (l_judge_str, 12,1) + Sub