Question

我有一个包含一系列数字1,2,3,4,5,11,12,13,14,15,101,102,103,104,105,510,511,512,513,515,516,517的表格。我想要一个PL / SQL函数，以便我可以获取范围，然后以下列格式将所有范围存储在单个字符串变量中。 “1-5,11-15,101-105,510-517”。

我已经获得了一个代码来生成SQL * Plus中的rages，但它在PL / SQL和表单中不起作用。程序如下：

  SQL> SET SERVEROUTPUT ON
  SQL> DECLARE
    2    v_list VARCHAR2(100);
    3  BEGIN
    4    SELECT listagg(RANGE, ',') WITHIN GROUP(
    5    ORDER BY min_num)
    6    INTO v_list
    7    FROM
    8      (SELECT MIN(num) min_num,
    9        MIN(num)
   10        ||'-'
   11        || MAX(num) range
   12      FROM
   13        (SELECT num, num-Row_Number() over(order by num) AS rn FROM t
   14        )
   15      GROUP BY rn
   16      );
   17    dbms_output.put_line(v_list);
   18  END;
   19  /
  1-3,5-7,10-12,20-20

Answer 1

如上所述https://code.google.com/p/gmaps-api-issues/issues/detail?id=7558，由于输出是一个字符串列表，您可以将输出声明并存储在 varchar2 变量中。

您可以创建过程并将整个逻辑放入其中。

例如，

<强>设置

SQL> CREATE TABLE t AS
  2  SELECT *
  3  FROM
  4    ( WITH data(num) AS
  5    ( SELECT 1 FROM dual
  6    UNION
  7    SELECT 2 FROM dual
  8    UNION
  9    SELECT 3 FROM dual
 10    UNION
 11    SELECT 5 FROM dual
 12    UNION
 13    SELECT 6 FROM dual
 14    UNION
 15    SELECT 7 FROM dual
 16    UNION
 17    SELECT 10 FROM dual
 18    UNION
 19    SELECT 11 FROM dual
 20    UNION
 21    SELECT 12 FROM dual
 22    UNION
 23    SELECT 20 FROM dual
 24    )
 25  SELECT * FROM DATA);

Table created.

<强>程序

SQL> CREATE OR REPLACE
  2  PROCEDURE p_get_list
  3  AS
  4    v_list VARCHAR2(100);
  5  BEGIN
  6    SELECT listagg(RANGE, ',') WITHIN GROUP(
  7    ORDER BY min_num)
  8    INTO v_list
  9    FROM
 10      (SELECT MIN(num) min_num,
 11        MIN(num)
 12        ||'-'
 13        || MAX(num) range
 14      FROM
 15        (SELECT num, num-Row_Number() over(order by num) AS rn FROM t
 16        )
 17      GROUP BY rn
 18      );
 19    dbms_output.put_line(v_list);
 20  END;
 21  /

Procedure created.

测试用例

SQL> SET SERVEROUTPUT ON
SQL> BEGIN
  2     p_get_list;
  3  END;
  4  /
1-3,5-7,10-12,20-20

PL/SQL procedure successfully completed.

您只需在Oracle Forms中调用该过程即可。

从表中的一系列数字中获取范围，并将所有范围存储在PLSQL / Oracle Forms中的字符串变量中

1 个答案: