单项选择题 Sales details are being stored on a daily basis in the SALES_2007 table. A large amount of data is added to the table daily. To save disk space，you issued the following command：   ALTER TABLE sales_2007 COMPRESS FOR ALL OPERATIONS；   What would be the outcome of this command？（）

单项选择题 In your production database, users report that they are unable to generate reports on an important table because it does not contain any data. While investigating the reason, you realize that another user executed the TRUNCATE TABLE command, which accidentally caused the data to be lost. Now you want to recover the lost data of the table without affecting objects in other schemas. Which method must you use to recover the lost data?（）

多项选择题 WhichtwostatementsabouttheSQLManagementBase（SMB）aretrue？（）