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Hidden Features of MySQL
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In general, all the SQLs I tuned today required using sub-queries. Having come from Oracle database world, things I took for granted weren’t working the same with MySQL. And my reading on MySQL tuning makes me conclude that MySQL is behind Oracle in terms of optimizing queries.
While the simple...
How do I compare two files using Eclipse? Is there any option provided by Eclipse?
How do I compare two files using Eclipse?
5 Answers
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Why are ToLookup and GroupBy different?
...cally they are the same thing but the performance implications of each are completely different. Calling ToLookup means I want a cache of the entire thing right now organized by group. Calling GroupBy means "I am building an object to represent the question 'what would these things look like if I o...
How to update SQLAlchemy row entry?
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user.no_of_logins += 1
session.commit()
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ReferenceError: event is not defined error in Firefox
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Java 8 method references: provide a Supplier capable of supplying a parameterized result
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How do I prevent the iPhone screen from dimming or turning off while my application is running?
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Adding a guideline to the editor in Visual Studio
...hanging the registry yourself:
http://visualstudiogallery.msdn.microsoft.com/en-us/0fbf2878-e678-4577-9fdb-9030389b338c
http://visualstudiogallery.msdn.microsoft.com/en-us/7f2a6727-2993-4c1d-8f58-ae24df14ea91
These are also part of the Productivity Power Tools, which includes many other very use...
Forward function declarations in a Bash or a Shell script?
...xecuting until the last line. By passing "$@" to main() you can access the command-line arguments $1, $2, et al just as you normally would.
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How to change column datatype from character to numeric in PostgreSQL 8.4
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You can try using USING:
The optional USING clause specifies how to compute the new column value from the old; if omitted, the default conversion is the same as an assignment cast from old data type to new. A USING clause must be provided if there is no implicit or assignment cast from old to...