大约有 45,000 项符合查询结果（耗时：0.0438秒） [XML]
MySQL, update multiple tables with one query
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WHERE Orders.OrderID = 1002;
EDIT:
Just for fun, let's add something a bit more interesting.
Let's say you have a table of books and a table of authors. Your books have an author_id. But when the database was originally created, no foreign key constraints were set up and later a bug in the fron...
Where are my postgres *.conf files?
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answered Aug 30 '10 at 18:31
Frank HeikensFrank Heikens
88.7k2222 gold badges121121 silver badges125125 bronze badges
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Installing python module within code
...d work. But I thought there is more elegant way;) I'll be waiting a little bit, may be there is.
– chuwy
Sep 8 '12 at 18:03
1
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Should URL be case sensitive?
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10
W3 guideline is reasonable. It simply states that one shouldn't make an assumption on how the server handles the URL you are submitting. It...
When should I use Struct vs. OpenStruct?
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Other benchmark:
require 'benchmark'
require 'ostruct'
REP = 100000
User = Struct.new(:name, :age)
USER = "User".freeze
AGE = 21
HASH = {:name => USER, :age => AGE}.freeze
Benchmark.bm 20 do |x|
x.report 'OpenStruct slow' do
REP.times do |index|
OpenStruct.new(:na...
How to delete SQLite database from Android programmatically
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answered Dec 12 '10 at 2:14
Luke DunstanLuke Dunstan
4,62311 gold badge1313 silver badges1414 bronze badges
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Unique ways to use the Null Coalescing operator [closed]
... a "don't know" representation for comparisons
The latter needs a little bit more information. Typically when you create a comparison with multiple elements, you need to see whether the first part of the comparison (e.g. age) gives a definitive answer, then the next part (e.g. name) only if the fi...
How to install grunt and how to build script with it
Hi I'm trying to install Grunt on Windows 7 64 bit. I have installed Grunt using commands
4 Answers
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Python string class like StringBuilder in C#?
... used the code of Oliver Crow (link given by Andrew Hare) and adapted it a bit to tailor Python 2.7.3. (by using timeit package). I ran on my personal computer, Lenovo T61, 6GB RAM, Debian GNU/Linux 6.0.6 (squeeze).
Here is the result for 10,000 iterations:
method1: 0.0538418292999 secs
process...
How to add a new row to an empty numpy array
...nd, since you're really not using numpy as intended during the loop:
In [210]: %%timeit
.....: l = []
.....: for i in xrange(1000):
.....: l.append([3*i+1,3*i+2,3*i+3])
.....: l = np.asarray(l)
.....:
1000 loops, best of 3: 1.18 ms per loop
In [211]: %%timeit
.....: a = np.e...