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Calculate difference between two datetimes in MySQL
..... etc. I want similar kind of functionality. For example there is one table say REQUESTS (id, message, timestamp). timestamp while storing will be NOW() . while i run a query, select * from requests, instead of displaying that value it should display id, message and how much time back request ...
How to disable margin-collapsing?
...collapsing") entail using a 1px border or 1px padding. I find this unacceptable: the extraneous pixel complicates calculations for no good reason. Is there a more reasonable way to disable this margin-collapsing?
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What is the difference between vmalloc and kmalloc?
...ral virtual-to-physical address mappings will have to be added to the page table. And in the worst case, there will be (size of buffer/page size) number of mappings added to the page table.
This also adds pressure on TLB (the cache entries storing recent virtual to physical address mappings) when a...
Difference between Dictionary and Hashtable [duplicate]
What is the difference between Dictionary and Hashtable. How to decide which one to use?
7 Answers
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What are the differences between NP, NP-Complete and NP-Hard?
...al definition. Moreover, "decidable" can also be defined in terms of "computable functions." So, the halting problem is a decision problem ("Does this program halt?" is a yes/no question) but it is undecidable; there is no effective method for determining whether or not an instance of the halting pr...
How to query as GROUP BY in django?
...eturning designation and dcount, what if i want to get other values of the table too?
– A.J.
Mar 5 '14 at 8:02
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Lock-free multi-threading is for real threading experts
...id some great work in JSR-166.
Cliff Click has an interesting take on hash tables that does not rely on lock-striping - as the Java and .NET concurrent hash tables do - and seem to scale well to 750 CPUs.
If you are not afraid to venture into Linux territory, the following article provides more ins...
jQuery $(document).ready and UpdatePanels?
...ut something that needs to happen on pageload? For example zebra striping tables? $('TABLE TR:nth-child(odd)').addClass('alt-row');
– Adam Youngers
Sep 8 '11 at 20:32
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How to use greater than operator with date?
...ecords. What I did is to include time, see below example
SELECT * FROM my_table where start_date > '2011-01-01 01:01:01';
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How to automatically generate a stacktrace when my program crashes
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For ARM, I had to also compile with -funwind-tables. Otherwise my stack depth was always 1 (empty).
– jfritz42
Apr 10 '13 at 20:17
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