ORA-12994: drop column option only allowed once in statement

文档解释

ORA-12994: drop column option only allowed once in statement

Cause: An attempt was made to repeat the drop column option in a single statement.

Action: Separate drop column options into different statements and resubmit statements.

ORA-12994：Drop列选项仅在一个语句中允许使用一次。

官方解释

常见案例

CREATE TABLE Table1 ( Column1 INT, Column2 INT); ALTER TABLE Table1 DROP COLUMN Column1; DROP COLUMN Column2;

正常处理方法及步骤

要解决此错误，只需将单个语句中的drop column/table操作分离开，例如：

CREATE TABLE Table1 ( Column1 INT, Column2 INT); ALTER TABLE Table1 DROP COLUMN Column1; ALTER TABLE Table1 DROP COLUMN Column2;