大约有 44,994 项符合查询结果（耗时：0.0520秒） [XML]
SQL - find records from one table which don't exist in another
...
There's several different ways of doing this, with varying efficiency, depending on how good your query optimiser is, and the relative size of your two tables:
This is the shortest statement, and may be quickest if your phone book is very short:
SELECT *
FROM Call
W...
How to use DISTINCT and ORDER BY in same SELECT statement?
...something like this:
SELECT DISTINCT Category, MAX(CreationDate)
FROM MonitoringJob
GROUP BY Category
ORDER BY MAX(CreationDate) DESC, Category
share
|
improve this answer
|
...
How does the SQL injection from the “Bobby Tables” XKCD comic work?
...
It drops the students table.
The original code in the school's program probably looks something like
q = "INSERT INTO Students VALUES ('" + FNMName.Text + "', '" + LName.Text + "')";
This is the naive way to add text inpu...
Center a map in d3 given a geoJSON object
... if you have a geoJSON object that you are going to draw you have to scale it and translate it in order to get it to the size that one wants and translate it in order to center it. This is a very tedious task of trial and error, and I was wondering if anyone knew a better way to obtain these values?...
How are people unit testing with Entity Framework 6, should you bother?
I am just starting out with Unit testings and TDD in general. I have dabbled before but now I am determined to add it to my workflow and write better software.
...
Initializing select with AngularJS and ng-repeat
I'm trying to get select-box to start off with a pre-filled option using ng-repeat with AngularJS 1.1.5. Instead the select always starts out with nothing selected. It also has an empty option, which I don't want. I think that there is a side effect of nothing being selected.
...
Reload activity in Android
Is it a good practice to reload an Activity in Android ?
18 Answers
18
...
How to check internet access on Android? InetAddress never times out
...Process = runtime.exec("/system/bin/ping -c 1 8.8.8.8");
int exitValue = ipProcess.waitFor();
return (exitValue == 0);
}
catch (IOException e) { e.printStackTrace(); }
catch (InterruptedException e) { e.printStackTrace(); }
return false;
}
+ could run ...
How can I perform a culture-sensitive “starts-with” operation from the middle of a string?
I have a requirement which is relatively obscure, but it feels like it should be possible using the BCL.
3 Answers
...
Can I stretch text using CSS?
...tretch text in CSS? I don't want the font to be bigger, because that makes it appear bolder than smaller text beside it. I just want to stretch the text vertically so it's kind of deformed. This would be in one div, and then the normal text beside it would be in another div. How can I do this?
...