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Efficient SQL test query or validation query that will work across all (or most) databases
...g_table WHERE 1=0
or
SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS
or
CALL NOW()
HSQLDB (tested with version 1.8.0.10)
Note: I tried using a WHERE 1=0 clause on the second query, but it didn't work as a value for Apache Commons DBCP's validationQuery, since the query doesn't return any rows
VAL...
Compare if BigDecimal is greater than zero
...omplete comment! I should at least write a proof of the arguments, my bad. Now I was looking for what happened, because I remember that I had to change things from "signum" to "compareTo" and I have no idea why. It was probably my mistake, as I did several tests now and I didn't find any problems wi...
What exactly does the “u” do? “git push -u origin master” vs “git push origin master”
...e remote or branch, git looks at the branch.<name>.merge setting to know where to pull from. git push -u sets this information for the branch you're pushing.
To see the difference, let's use a new empty branch:
$ git checkout -b test
First, we push without -u:
$ git push origin test
$ git...
Convert an image to grayscale in HTML/CSS
...
Support for CSS filters has landed in Webkit. So we now have a cross-browser solution.
img {
filter: gray; /* IE6-9 */
-webkit-filter: grayscale(1); /* Google Chrome, Safari 6+ & Opera 15+ */
filter: grayscale(1); /* Microsoft Edge and Firefox 35+ */
}
/*...
How to install and run phpize
...phpize it. I installed php5-dev by sudo apt-get install php5-dev . But now when I run phpize I get the following error :
...
Could not find method compile() for arguments Gradle
Looked around for this solution for much too long now, and I'm not sure if I missed it or just misstyped something, but my Gradle script will not compile. I am migrating to Gradle, and am very new with it. I am very used to using Maven for dependency management, but Gradle seems best me for now. Fro...
Is it possible to use raw SQL within a Spring Repository
...ollNo(String rollNo) {
this.rollNo = rollNo;
}
}
Now your Projection class is like bellow. It can those fields that you needed.
public interface IUserProjection {
int getId();
String getName();
String getRollNo();
}
And Your Data Access Object(Dao) is like...
How to remove indentation from an unordered list item?
...
Well, now that you edited your answer the bullets are maintained, but there is still the problem that <li>s with multiple text lines don't correctly indent all lines. It you keep on editing you may finally end up with my solu...
Failed to import new Gradle project: failed to find Build Tools revision *.0.0
...
This is the most straightforward answer as of now. Thanks!
– Steven Carlton
Nov 15 '16 at 22:22
...
Difference between __getattr__ vs __getattribute__
...efined. In the following example my class Count has no __getattr__ method. Now in main when I try to access both obj1.mymin and obj1.mymax attributes everything works fine. But when I try to access obj1.mycurrent attribute -- Python gives me AttributeError: 'Count' object has no attribute 'mycurrent...