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Add 10 seconds to a Date
...he intended and supported approach, and would be clear to most programmers coming from different languages without encyclopedic knowledge of the undocumented nuances of each particular JavaScript engine.
– Tom Dibble
Oct 16 '17 at 16:42
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difference between primary key and unique key
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You can find detailed information from:
http://www.dotnet-tricks.com/Tutorial/sqlserver/V2bS260912-Difference-between-Primary-Key-and-Unique-Key.html
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