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MySql Table Insert if not exist otherwise update
... using INSERT ... ON DUPLICATE KEY UPDATE on tables against a table having more than one unique or primary key. Taken from MySQL documentation: In addition, beginning with MySQL 5.5.24, an INSERT ... ON DUPLICATE KEY UPDATE statement against a table having more than one unique or primary key is als...
Should struct definitions go in .h or .c file?
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I think I agree with this answer more. It's not about using the struct through any other .c files or not, it's whether the struct should be considered public (and so, accessible) or not.
– c00kiemon5ter
Jun 11 '11 at 16...
Why are these numbers not equal?
...ls 0.15") else cat("i does not equal 0.15")
yields
i equals 0.15
Some more examples of using all.equal instead of == (the last example is supposed to show that this will correctly show differences).
0.1+0.05==0.15
#[1] FALSE
isTRUE(all.equal(0.1+0.05, 0.15))
#[1] TRUE
1-0.1-0.1-0.1==0.7
#[1] F...
What’s the best way to reload / refresh an iframe?
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198
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In MySQL what does “Overhead” mean, what is bad about it, and how to fix it?
...er gas mileage, etc. A car
that gets lots of mileage requires
tune-ups more often. A database that
gets heavy use requires the same. If
you are doing a lot of UPDATE and/or
DELETE operations, and especially if
your tables have variable length
columns (VARCHAR, TEXT, etc), you need
to...
AVD Manager - Cannot Create Android Virtual Device
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How do I do multiple CASE WHEN conditions using SQL Server 2008?
What I'm trying to do is use more than one CASE WHEN condition for the same column.
10 Answers
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GraphViz - How to connect subgraphs?
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92
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Guava: Why is there no Lists.filter() function?
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It's more like: List filteredList = newArrayList(filter(originalList, new Predicate<T>() { @Override public boolean apply(T input) { return (...); } })); or ie. List filteredList = newArrayList(filter(originalList, Predicate...