大约有 44,000 项符合查询结果（耗时：0.0534秒） [XML]
SQL Query to concatenate column values from multiple rows in Oracle
...
There are a few ways depending on what version you have - see the oracle documentation on string aggregation techniques. A very common one is to use LISTAGG:
SELECT pid, LISTAGG(Desc, ' ') WITHIN GROUP (ORDER BY seq) AS description
FROM B GROUP BY pid...
Simpler way to create dictionary of separate variables?
I would like to be able to get the name of a variable as a string but I don't know if Python has that much introspection capabilities. Something like:
...
How do I copy a version of a single file from one git branch to another?
.../<branch_name> <file_or_dir>
Some notes (from comments):
Using the commit hash you can pull files from any commit
This works for files and directories
overwrites the file myfile.txt and mydir
Wildcards don't work, but relative paths do
Multiple paths can be specified
an alternative...
How to find/remove unused dependencies in Gradle
I wanted to find unused dependencies in my project. Is there a feature for this in Gradle, like in Maven?
6 Answers
...
How to vertically center a div for all browsers?
...Script, but only pure CSS. I found some solutions, but all of them are missing Internet Explorer 6 support.
45 Answers
...
How to create index on JSON field in Postgres?
In PostgreSQL 9.3 Beta 2 (?), how do I create an index on a JSON field? I tried it using the -> operator used for hstore but got the following error:
...
Fit image into ImageView, keep aspect ratio and then resize ImageView to image dimensions?
...
(The answer was heavily modified after clarifications to the original question)
After clarifications:
This cannot be done in xml only. It is not possible to scale both the image and the ImageView so that image's one dimension would always be 250dp and the ImageView would have the same dim...
When should I use jQuery's document.ready function?
...
In simple words,
$(document).ready is an event which fires up when document is
ready.
Suppose you have placed your jQuery code in head section and trying to access a dom element (an anchor, an img etc), you will not b...
Can I change the fill color of an svg path with CSS?
I have the following code:
8 Answers
8
...
Bootstrap close responsive menu “on click”
On "PRODUCTS" click I slide up a white div (as seen in attached). When in responsive (mobile and tablet), I would like to automaticly close the responsive navbar and only show the white bar.
...