大约有 43,000 项符合查询结果（耗时：0.0447秒） [XML]
What's faster, SELECT DISTINCT or GROUP BY in MySQL?
...y i) a;
count
10001
(1 row)
Time: 594,481 ms
http://www.pgsql.cz/index.php/PostgreSQL_SQL_Tricks_I
so be careful ... :)
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How to prevent form from submitting multiple times from client side?
... I agree. Should be form page ---submits to---> form_submission_script.php ---after saving, redirects to---> form_thankyou.html
– Simon East
Sep 7 '11 at 2:18
add a com...
How to change the default encoding to UTF-8 for Apache?
...
In .htaccess add this line:
AddCharset utf-8 .html .css .php .txt .js
This is for those that do not have access to their server's conf file.
It is just one more thing to try when other attempts failed.
As far as performance issues regarding the use of .htaccess I have not seen t...
How can I check if a value is a json object?
...ly string values through ajax (which can be fairly useful if you are using PHP or ASPX to process ajax requests and might or might not return JSON depending on conditions)
The solution is quite simple, you can do the following to check if it was a valid JSON return
var IS_JSON = true;
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Javascript add leading zeroes to date
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You can define a "str_pad" function (as in php):
function str_pad(n) {
return String("00" + n).slice(-2);
}
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How do I kill all the processes in Mysql “show processlist”?
...ny massive kill command. You can script it in any language, for example in PHP you can use something like:
$result = mysql_query("SHOW FULL PROCESSLIST");
while ($row=mysql_fetch_array($result)) {
$process_id=$row["Id"];
if ($row["Time"] > 200 ) {
$sql="KILL $process_id";
mysql_query...
Best way to build a Plugin system with Java
... * using the attachment found at bugs.freenetproject.org/print_bug_page.php?bug_id=1900
– ataulm
Nov 28 '12 at 22:07
...
Pretty graphs and charts in Python [closed]
...for Python?
I can't speak about this one, but I've used ChartDirector for PHP and it's pretty good.
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answered Sep 9 '08 at 19:13
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How do I modify the URL without reloading the page?
...entries, respectively.
window.history.pushState('page2', 'Title', '/page2.php');
Read more about this from here
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How do I use regex in a SQLite query?
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A SQLite UDF in PHP/PDO for the REGEXP keyword that mimics the behavior in MySQL:
$pdo->sqliteCreateFunction('regexp',
function ($pattern, $data, $delimiter = '~', $modifiers = 'isuS')
{
if (isset($pattern, $data) === tr...