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分类： Oracle
2019-02-27 10:32:50
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)
