题目内容

安全带（绳）每次使用前，必须进行外观检查，有下列情况者严禁使用：（）

A. 断股、霉变、损伤
B. 铁环有裂纹
C. 挂钩变形
D. 缝线脱开

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更多问题

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 to delete the records because the records are locked in SHARE mode.
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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