大约有 40,000 项符合查询结果（耗时：0.0283秒） [XML]
Update a record without first querying?
...teStoreCommand
("UPDATE items SET itemstatus = 'some status' WHERE id = 123 ");
For performance reasons, you may want to pass in variables instead of a single hard coded SQL string. This will allow SQL Server to cache the query and reuse with parameters. Example:
dataEntity.ExecuteStoreComma...
ALTER DATABASE failed because a lock could not be placed on database
...nnection 1 (leave running for a couple of minutes)
CREATE DATABASE TESTING123
GO
USE TESTING123;
SELECT NEWID() AS X INTO FOO
FROM sys.objects s1,sys.objects s2,sys.objects s3,sys.objects s4 ,sys.objects s5 ,sys.objects s6
Connections 2 and 3
set lock_timeout 5;
ALTER DATABASE TESTING123 SET ...
How do I calculate percentiles with python/numpy?
...2, 1.26, 1.32, 1.38, 1.44, 1.5, 1.56, 1.62, 1.68, 1.74, 1.8, 1.86, 1.92, 1.98, 2.04, 2.1, 2.16, 2.22, 2.28, 2.34, 2.4, 2.46, 2.52, 2.58, 2.64, 2.7, 2.76, 2.82, 2.88, 2.94, 3.0, 3.06, 3.12, 3.18, 3.24, 3.3, 3.36, 3.42, 3.48, 3.54, 3.6, 3.66, 3.72, 3.78, 3.84, 3.9, 3.96, 4.02, 4.08, 4.14, 4.2, 4.26, 4...
setTimeout in for-loop does not print consecutive values [duplicate]
...
Dan Dascalescu
98.2k3636 gold badges263263 silver badges333333 bronze badges
answered Mar 7 '11 at 23:00
Darin Dimit...
How to properly URL encode a string in PHP?
...le:
$dataString = "https://www.google.pl/search?q=PHP is **great**!&id=123&css=#kolo&email=me@liszka.com)";
$dataStringUrlEncodedRFC1738 = UrlEncoder::encode($dataString, UrlEncoder::STANDARD_RFC1738);
$dataStringUrlEncodedRFC3986 = UrlEncoder::encode($dataString, UrlEncoder::STANDARD_R...
How does python numpy.where() work?
...81,
82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98,
99]),)
>>> np.where(a == 90)
(array([90]),)
a = a*40
>>> np.where(a > 1000)
(array([26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
43, 44, 45, 46, 47, 48, 49, 50, 5...
Drawing a line/path on Google Maps
...nswered Oct 20 '10 at 5:08
richa123richa123
21122 silver badges22 bronze badges
...
Unix command to find lines common in two files
...)-release
Copyright (C) 2007 Free Software Foundation, Inc.
$ cat > abc
123
567
132
$ cat > def
132
777
321
So the files abc and def have one line in common, the one with "132".
Using comm on unsorted files:
$ comm abc def
123
132
567
132
777
321
$ comm -12 abc def # No output! ...
What does ~~ (“double tilde”) do in Javascript?
...umbers.
Math.trunc(13.37) // 13
Math.trunc(42.84) // 42
Math.trunc(0.123) // 0
Math.trunc(-0.123) // -0
Math.trunc("-1.123")// -1
Math.trunc(NaN) // NaN
Math.trunc("foo") // NaN
Math.trunc() // NaN
The polyfill:
function trunc(x) {
return x < 0 ? Math.ceil(x) : Math....
How does this giant regex work?
...gjqZcsRSipdaFE6/+3DViBqo7KS9V3fF3qz9ia94cqMb3XR9igOdbbjEP4N5KfONqolOx9wrmxt98IOWoLQA3Au/X09GNDfvcWghSMuvwGf2wjzkmreEmMOJDfEDR0ygB7CtkG6QYCbBgBrS7FQW9MrVQZCYqNZh9ws4QaxrIN0XRuRmaa2sj//o23XksVUR1bBSSJ2whGqrrs935leQdNyQ0/eqKoEaG6xNmt5eJbOuRAnKMv2BhG/TRXA9QcILWNv4VIFzxXGG/QVrkQt0QKYPkpAaZVCWI4FSb52Q7S/L...