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标题: ORA-12999: cannot DROP or SET UNUSED a [打印本页]

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作者: admin    时间: 2016-8-12 13:56
标题: ORA-12999: cannot DROP or SET UNUSED a
ORA-12999: cannotDROP or SET UNUSED a column that has been set unused
Cause: An attempt was made to DROP or SET UNUSED a columnthat has
already been 'set unused'.
Action: Usethe DROP UNUSED COLUMNS option to remove the column.

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