- 42,(9-1)choose the best answer:
- Which statement is true about the Oracle SQL, DELETE and TRUNCATE statements?
A) DELETE but not TRUNCATE statement can be used to remove data from selective columns and rows of a table.
- B) DELETE and TRUNCATE statements can have a rollback done to restore data into a table.
- C) DELETE and TRUNCATE statements remove all indexes for the tables on which they are performed.
D) DELETE but not TRUNCATE statement can be used to selectively remove rows from a table.
- Answer:D
- (解析: Truncate 是删除整张表的数据, delete 不能删除某个列的数据, 删除的是行的数据)
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