缺少數字腳本不會工作？

Question

此腳本將從以下字符串中獲取序列，年，月和日...... 然後從序列部分找到缺失的數字（如1111,1112,115，..等） 問題在於輸出這個腳本不正確不DBMS丟失號碼

EMP-1111_14_01_01_2141_G1

EMP-1112_14_01_01_1612_G1

EMP-1115_14_01_01_1109_G1

EMP-1116_14_01_01_1315_G1

EMP-1118_14_01_01_0910_G2

EMP-1121_14_01_01_1105_G1

EMP-1111_14_01_01_1120_G2

輸出結果應該是這樣的

缺少數1113

缺少數1114

缺少數1117

缺少數1118

缺少數1119

缺少數1120

declare 
    v_name   table1.ENAME%TYPE; 
    V_seq   NUMBER (4); 
    V_Year   number(2); 
    V_Month   number (2); 
    V_day   number (2); 
    max_seq   number(4); 
    min_seq   number(4); 

    CURSOR List_ENAME_cur IS 
    SELECT ENAME from table1 
    WHERE status = 2; 
begin 

    FOR List_ENAME_rec IN List_ENAME_cur loop 
    if REGEXP_LIKE(List_ENAME_cur.ENAME,'emp[-][1-9]{4}[_][1-9]{2}[_][1-9]{2}[_][1-9]{2}[_][0-9]{4}[_][G]["1"]') then 
     V_seq := substr(List_ENAME_cur.ename,5,4); 
     V_Year := substr(List_ENAME_cur.ename,10,2); 
     V_Month := substr(List_ENAME_cur.ename,13,2); 
     V_day := substr(List_ENAME_cur.ename,16,2); 


     if min_seq is null or V_seq_FILENAME < min_seq then 
     min_seq := V_seq_FILENAME; 
     DBMS_OUTPUT.PUT_LINE('Missing number '||min_seq); 
     end if; 

     if max_seq is null or V_seq_FILENAME > max_seq then 
     max_seq := V_seq_FILENAME; 
     DBMS_OUTPUT.PUT_LINE('Missing number '||max_seq); 
     end if; 

    end if; 
    end loop;  
    DBMS_OUTPUT.PUT_LINE('max_seq '||max_seq||' min_seq '||min_seq);  
end; 

Answer 1

參見本實施例中

WITH ORDH 
    AS (SELECT 1111 AS ORDERNO FROM DUAL 
     UNION ALL 
     SELECT 1112 AS ORDERNO FROM DUAL 
     UNION ALL 
     SELECT 1115 AS ORDERNO FROM DUAL 
     UNION ALL 
     SELECT 1116 AS ORDERNO FROM DUAL 
     UNION ALL 
     SELECT 1118 AS ORDERNO FROM DUAL 
     UNION ALL 
     SELECT 1121 AS ORDERNO FROM DUAL), 
    GOT_NEXT_ORDERNO 
    AS (SELECT ORDERNO, 
       LEAD (ORDERNO) OVER (ORDER BY ORDERNO) AS NEXT_ORDERNO 
     FROM ORDH) 
SELECT ORDERNO + 1 AS FROM_NO, NEXT_ORDERNO - 1 AS TO_NO 
FROM GOT_NEXT_ORDERNO 
WHERE ORDERNO + 1 <> NEXT_ORDERNO; 

    FROM_NO  TO_NO 
---------- ---------- 
     1113  1114 
     1117  1117 
     1119  1120 

3 rows selected.