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What is the difference between JOIN and UNION?

... Joins and Unions can be used to combine data from one or more tables. The difference lies in how the data is combined. In simple terms, joins combine data into new columns. If two tables are joined together, then the data from the first table is shown in one set of column alongs...
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Convert string to binary in python

... What about converting more-than-one-byte chars, like β, e.g., which seems to me represented by 11001110 10110010 internally? – Sergey Bushmanov Mar 25 '17 at 20:18 ...
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XPath contains(text(),'some string') doesn't work when used with node with more than one Text subnod

...BC')]. I had always used the pattern given by Mike Milkin, thinking it was more appropriate, but just doing contains on the current context seems to actually be what I want more often. – knickum Nov 16 '15 at 22:58 ...
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Set a default font for whole iOS app?

...  |  show 10 more comments 121 ...
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How do I query if a database schema exists

... Darn... in the time it took me to edit the post to make it more readable... you fixed my problem. Thanks mucho! – Pulsehead Oct 22 '08 at 15:00 18 ...
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SQL Server: Difference between PARTITION BY and GROUP BY

...ows returned results which can save you time as opposed to jumping through more learning hoops and time to learn Northwind – Praxiteles Jan 16 '16 at 10:18 1 ...
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Threads vs Processes in Linux

...d pthread_create() calls clone(most sharing). ** forking costs a tiny bit more than pthread_createing because of copying tables and creating COW mappings for memory, but the Linux kernel developers have tried (and succeeded) at minimizing those costs. Switching between tasks, if they share the sam...
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WCF Service , how to increase the timeout?

Might seem like a silly question, but everything in WCF seems a lot more complicated than in asmx, how can I increase the timeout of an svc service? ...
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How do I create a list of random numbers without duplicates?

...only need to actually read from the file once, before your loop. It's much more efficient to do this than to seek back to the start of the file and call f1.readlines() again for each loop iteration. share | ...
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Generate random numbers uniformly over an entire range

... GIVE ATTENTION to this answer, since it's far more modern. – gsamaras Dec 12 '14 at 21:51 ...