Question

**COLOR**   **TIMES**
ORANGE         1
RED            2
BLACK          3
YELLOW         4

但是我需要以下面的格式显示数据： -

**COLOR**   **TIMES**
ORANGE          1
RED             1
RED             1
BLACK           1
BLACK           1
BLACK           1
YELLOW          1
YELLOW          1
YELLOW          1
YELLOW          1

请在oracle SQL中建议我查询

Answer 1

可能的解决方案：

SQL> with t as (
  2     select 'ORANGE' as color, 1 as times from dual
  3     union all select 'RED' as color, 2 as times from dual
  4     union all select 'BLACK' as color, 3 as times from dual
  5     union all select 'YELLOW' as color, 4 as times from dual),
  6  num as (
  7     select rownum as n
  8       from dual
  9    connect by level <= 4)
 10  select t.color,
 11         1 as times
 12    from t
 13    join num on num.n <= t.times
 14   order by t.times;

COLOR       TIMES
------ ----------
ORANGE          1
RED             1
RED             1
BLACK           1
BLACK           1
BLACK           1
YELLOW          1
YELLOW          1
YELLOW          1
YELLOW          1

10 rows selected.

Answer 2

也许不是很好但是有效：

WITH t AS
    (SELECT 'Orange' AS color, 1 AS times FROM dual UNION ALL
    SELECT 'Red' AS color, 2 AS times FROM dual UNION ALL
    SELECT 'Black' AS color, 3 AS times FROM dual UNION ALL
    SELECT 'Yellow' AS color, 4 AS times FROM dual), 
t2 AS 
    (SELECT DISTINCT color, 1 AS item, times, LEVEL AS C
    FROM t
    CONNECT BY LEVEL <= times)
SELECT color, item
FROM t2;

我有一个数据库的源表

2 个答案: