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Is it a good idea to index datetime field in mysql?
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But if you query the data with date range, such as data range from "2017-01-01 11:20" to "2018-01-03 12:12", it doesn't make SELECT query faster even though I indexed date time column... index make query fast when I use equal operation.. Am i right?
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How to explore web-based Google Play in another country?
... to a certain country you have to use a host that can send requests via IP ranges or providers that Google recognizes as being from that country. Proxies provide exactly that functionality.
Yes, you are right, developers or others in charge of testing Google services will likely not use proxies, th...
UnicodeDecodeError, invalid continuation byte
...ror: 'ascii' codec can't encode characters in position 2-3: ordinal not in range(128) error on using .encode(latin-1)
– Shiva
Oct 17 '19 at 7:31
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Bytes of a string in Java
...erences and a char[]. The Java language specification defines, that a char ranges from 0 to 65535, so two bytes are sufficient to keep a single char in memory. But a JVM does not have to store one char in 2 bytes, it only has to guarantee, that the implementation of char can hold values of the defin...
Container-fluid vs .container
...In other words, it will be different specific aka "fixed" widths different ranges of screen widths.
Semantics: "fixed width"
You can see how naming confusion can arise. Technically, we can say .container is "fixed width", but it is fixed only in the sense that it doesn't resize at every granular ...
Uncaught TypeError: Cannot read property 'msie' of undefined - jQuery tools
...endation for a replacement library? Something with a scroller, overlay and range input slider? I avoid jQuery mobile because it comes pre-styled. I have styled it before and it's a nightmare.
– inorganik
Mar 18 '13 at 15:56
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How can I convert a hex string to a byte array? [duplicate]
...public static byte[] StringToByteArray(string hex) {
return Enumerable.Range(0, hex.Length)
.Where(x => x % 2 == 0)
.Select(x => Convert.ToByte(hex.Substring(x, 2), 16))
.ToArray();
}
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What is the most ridiculous pessimization you've seen? [closed]
...tion playland.
Favorites include:
Split a table into multiples (by date range, alphabetic range, etc.) because it's "too big".
Create an archive table for retired records, but continue to UNION it with the production table.
Duplicate entire databases by (division/customer/product/etc.)
Resist add...
What database does Google use?
...riented and column-oriented databases.
designed to scale into the petabyte range
it works across hundreds or thousands of machines
it is easy to add more machines to the system and automatically start taking advantage of those resources without any reconfiguration
each table has multiple dimensions ...
How do I enable MSDTC on SQL Server?
...ewall people don't like that, they like to restrict the ports to a certain range. You can restrict the RPC dynamic port generation to a certain range using the keys as described in How to configure RPC dynamic port allocation to work with firewalls.
In my experience, if the DTCPing is able to set...