empty pages

As we know, we can use dbms_lock package to manage our application locks. For example we can create «lock» for synchronize logic in application or you can «lock» your external resources (file handler, network sockets etc).

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Yesterday I tried to take picture of newest bridge in Saint-Peterburg. This bridge is unique – only this brige don’t draw in middle night. And only via this bridge is possible to cross river (Neva) in night.