大约有 43,000 项符合查询结果（耗时：0.0846秒） [XML]
is it possible to select EXISTS directly as a bit?
...ike 'theValue%'
When you cast to bit
0 -> 0
everything else -> 1
And NULL -> NULL of course, but you can't get NULL with COUNT(*) without a GROUP BY
bit maps directly to boolean in .net datatypes, even if it isn't really...
This looks similar but gives no row (not zero) if no matches...
Convert JS date time to MySQL datetime
...me? Also is there a way to add a specific number of minutes to JS datetime and then pass it to MySQL datetime?
12 Answers
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How to get first element in a list of tuples?
I have a list like below where the first element is the id and the other is a string:
12 Answers
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List files in local git repo?
I'm using Sparkleshare, which uses Git to sync files between my laptop and my backup server.
3 Answers
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How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly
I have a dataframe with ~300K rows and ~40 columns.
I want to find out if any rows contain null values - and put these 'null'-rows into a separate dataframe so that I could explore them easily.
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bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need
... above outputs on my Terminal. I am on Mac OS 10.7.x. I have Python 2.7.1, and followed this tutorial to get Beautiful Soup and lxml, which both installed successfully and work with a separate test file located here . In the Python script that causes this error, I have included this line:
fr...
relative path in BAT script
...sewhere (XP, Vista oder Windwos 8 --> I don't know but: Microsoft logic and I couldn't find any docs about it ;)). However, I found that I had to put quotation marks around it ("%~dp0\bin\Iris.exe") as the path had a whitespace in it :) Just to be really sure it works on every computer.
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'typeid' versus 'typeof' in C++
I am wondering what the difference is between typeid and typeof in C++. Here's what I know:
6 Answers
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What is the PostgreSQL equivalent for ISNULL()
...ited Jan 14 '12 at 2:28
Erwin Brandstetter
439k9696 gold badges809809 silver badges969969 bronze badges
answered Feb 6 '10 at 20:02
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Getting “Lock wait timeout exceeded; try restarting transaction” even though I'm not using a transac
... on some record (you're updating every record in the table!) for too long, and your thread is being timed out.
You can see more details of the event by issuing a
SHOW ENGINE INNODB STATUS
after the event (in sql editor). Ideally do this on a quiet test-machine.
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