定义一个包含一个系统时间区间的表将指示DB 2 10自动捕获表状态更改并将“旧”行存储在一个历史表中。
Defining a table with a system time period instructs DB2 10 to automatically capture changes made to the state of the table and to save the "old" rows in a history table.
电源开关指示灯，显示实时工作状态；三重安全保护装置：水开自动断电、干烧保护、熔断保护；
Indicator light of power supply indicates the working state3-level protection system:Automatic switch off, Boil-dry protection, Fusing protection.
应用推荐