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SQL Server: Difference between PARTITION BY and GROUP BY
...y're used in different places. group by modifies the entire query, like:
select customerId, count(*) as orderCount
from Orders
group by customerId
But partition by just works on a window function, like row_number:
select row_number() over (partition by customerId order by orderId)
as OrderN...
html (+css): denoting a preferred place for a line break
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Works great - when it is important, that chars like "-" non break. Example: Perikles <span class="avoidwrap">(um&nbsp;500-429&nbsp;v.Chr.)</span>
– Sarah Trees
May 19 '15 at 17:37
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How can I get enum possible values in a MySQL database?
... This solution works on codeigniter github.com/thiswolf/codeigniter-enum-select-boxes
– You Know Nothing Jon Snow
Jul 7 '13 at 16:28
3
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How to change package name of Android Project in Eclipse?
...can rename or change the package name, and also by right-clicking and then select Rename option, you can change or rename the package name.
When you press F2, it will show you the dialog box as:
In this dialog, don't forget to check the "Update references" checkbox because by making "check" to t...
Converting a Java Keystore into PEM Format
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KeyStore ks = KeyStore.getInstance("jks");
/* Load the key store. */
...
char[] password = ...;
/* Save the private key. */
FileOutputStream kos = new FileOutputStream("tmpkey.der");
Key pvt = ks.getKey("your_alias", password);
kos.write(pvt.getEncoded());
kos.flush();
kos.close();
/* Save the cer...
Encrypt Password in Configuration Files? [closed]
...nt keyLength = 128;
SecretKeySpec key = createSecretKey(password.toCharArray(),
salt, iterationCount, keyLength);
String originalPassword = "secret";
System.out.println("Original password: " + originalPassword);
String encryptedPassword = encrypt(orig...
CSS Child vs Descendant selectors
I am a bit confused between these 2 selectors.
8 Answers
8
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SQL Group By with an Order By
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In all versions of MySQL, simply alias the aggregate in the SELECT list, and order by the alias:
SELECT COUNT(id) AS theCount, `Tag` from `images-tags`
GROUP BY `Tag`
ORDER BY theCount DESC
LIMIT 20
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Unable to export Apple production push SSL certificate in .p12 format
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Turns out all you have to do is select "My Certificates" on the left panel and it enables the .p12 option.
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No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
...and check your installed JREs. You should have an entry with a JDK there.
Select the Execution Env as show below. Click OK
Then Right-Click on your Project -> Maven -> Update Project
Additionally, you may have to change Maven JRE (see @jlars62 answer) which is as follows. Goto Run -> Ru...