我要查询表值
Column1 Column2 Column3
-----------------------
a b c
d e f
结果应为
Column1 a
Column2 b
Column3 c
Column1 d
Column2 e
Column3 f
基本上是一个键值对。在Oracle中可以吗?
非常感谢您的帮助
您可以用UNION ALL
完成此操作,]:
SELECT 'Column1' as Name, Column1 as Value FROM my_table
UNION ALL
SELECT 'Column2' as Name, Column2 as Value FROM my_table
UNION ALL
SELECT 'Column3' as Name, Column3 as Value FROM my_table