生产关系一定要适应生产力状况的规律是我国经济体制改革的依据。( )
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科技革命是推动经济和社会发展的强大杠杆。( )
A. 对
B. 错
下面的事件不能够激活触发器的是()
A. SELECT
B. INSERT
C. UPDATE
DELETE
当事件需要在当前时间过后20秒执行,则该时间的“ON SHCEDULE”表达式为()
A. ON SCHEDULE 20 SECOND
B. ON SCHEDULE AT 20 SECOND
C. ON SCHEDULE AT CURRENT_TIMESTAMP +20 SECOND
D. ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 20 SECOND
当事件需要在当前时间过后1小时开始执行,每6分钟执行一次,当前时间过后3小时结束,则该事件的ON SCHEDULE表达式为()
A. ON SCHEDULE AT 6 MINUTESTARTS CURRENT_TIMESTAMP +INTERVAL 1 HOURENDS CURRENT_TIMESTAMP +INTERVAL 3 HOUR
B. ON SCHEDULE EVERY 6 MINUTESTARTS CURRENT_TIMESTAMP +INTERVAL 1 HOURENDS CURRENT_TIMESTAMP+INTERVAL 3 HOUR
C. ON SCHEDULE AT 6 MINUTESTARTS CURRENT_TIMESTAMP + 1 HOURENDS CURRENT_TIMESTAMP+ 3 HOUR
D. ON SCHEDULE EVERY 6 MINUTESTARTS CURRENT_TIMESTAMP + 1 HOURENDS CURRENT_TIMESTAMP+ 3 HOUR