大约有 46,000 项符合查询结果（耗时：0.0751秒） [XML]
NOT IN vs NOT EXISTS
...ley. In the example there the number of logical reads increase from around 400 to 500,000.
Additionally the fact that a single NULL can reduce the row count to zero makes cardinality estimation very difficult. If SQL Server assumes that this will happen but in fact there were no NULL rows in the da...
How to stop tracking and ignore changes to a file in Git?
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WonderLand
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answered Jun 1 '09 at 19:16
anthonyanthony
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Is recursion ever faster than looping?
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edited Apr 16 '10 at 7:45
answered Apr 16 '10 at 7:00
Di...
find -exec with multiple commands
...Alan W. Smith
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answered May 18 '11 at 11:25
TinkerTinker
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CRON job to run on the last day of the month
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184
Possibly the easiest way is to simply do three separate jobs:
55 23 30 4,6,9,11 * myjob....
Windows batch file file download from a URL
... Abel
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answered Dec 9 '13 at 17:34
sevenforcesevenforce
6,36533 go...
How do I programmatically “restart” an Android app?
...vity = new Intent(context, StartActivity.class);
int mPendingIntentId = 123456;
PendingIntent mPendingIntent = PendingIntent.getActivity(context, mPendingIntentId, mStartActivity, PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager mgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);...
F# changes to OCaml [closed]
... not support:
functors
OCaml-style objects
polymorphic variants
the camlp4/5 preprocessor or extension points (ppx)
In addition, F# has a different syntax for labeled and optional parameters.
In theory, OCaml programs that don't use these features can be compiled with F#. Learning OCaml is a pe...
Alternatives to gprof [closed]
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74
Valgrind has an instruction-count profiler with a very nice visualizer called KCacheGrind. As M...
Postgresql: Scripting psql execution with password
... ReeceReece
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