User A executes the following command to drop a large table in your database: SQL> DROP TABLE trans; While the drop table operation is in progress, user B executes the following command on the same table: SQL> DELETE FROM trans WHERE tr_type=’SL’; Which statement is true regarding the DELETE command()
A. It fails with a "Resource Busy" error.
B. It deletes the rows successfully because the table is locked in SHARE mode.
C. It fails to delete the records because the table is locked in EXCLUSIVE mode.
D. It deletes the rows successfully because the table is locked in SHARE ROW EXCLUSIVE mode.
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斜巷运输每隔()m须装设一台跑车防护装置。
A. 100
B. 150
C. 200
一般来说,法律主体不一定是会计主体,会计主体必然是法律主体。
A. 正确
B. 错误
为了使包装物成为激发顾客购买欲望的主要诱因,客观要求在包装物设计中注重()。
A. 差异
B. 安全性
C. 便利
D. 艺术性