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select distinct '1' t1,'2' t2,'3' t3,'4' t4 from table ²é³öÀ´µÄ½á¹ûΪ
1,2,3,4
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1
2
3
4
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ûÓкõķ½·¨£¬ÓÃunion£¬Ò»ÌõÌõ¼Ç¼ƴ½Ó

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SQL code:
with temp as(
select '1' t1,'2' t2,'3' t3,'4' t4 from dual
)
select t1 from temp
union all
select t2 from temp
union all
select t3 from temp
union all
select t4 from temp

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SQL code:

union all --°É

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http://topic.csdn.net/u/20100508/14/39983236-42ff-4223-8962-cfdd14130975.html
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¿ÉÒÔÓÃdecodeÅжÏ
decode(a,1,b,2,c,3,d,4) ÅжÏÈç¹û=a ÔòֵΪ1 ¡£¡£¡£¡£¡£

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ORACLE 11g к¯Êý£º
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SQL code:
WITH TEMP AS
(SELECT '1' T1,
'2' T2,
'3' T3,
'4' T4
from DUAL)
SELECT *
from TEMP UNPIVOT(T_VALUE FOR T_TYPE IN(T1 AS 'T1', T2 AS 'T2',
T3 AS 'T3', T4 AS 'T4'))



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SQL code:
WITH TEMP AS
(SELECT 'T1' T_TYPE,'1' T_VALUE fr