http://www.geekwire.com/2012/chart-pays-seattle-software-engineers/ Chart: Who pays the most in Seattle for software engineers BY JOHN COOK on February 2, 2012 at 3:14 pm 15 Comments Share 35 Tweet Share 19 Reddit Email FAQ: What to know for to
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使用Flashback Query的场景包括如下: 摘自官档 Recovering lost data or undoing incorrect, committed changes. For example, if you mistakenly delete or update rows, and then commit them, you can immediately undo the mistake. Comparing current data with the correspondi