大约有 9,000 项符合查询结果（耗时：0.0234秒） [XML]
Detect if a NumPy array contains at least one non-numeric value?
...arly oddness with NAN and boolen NULL is true in many languages, including SQL (where NULL=NULL is never true).
– user48956
Oct 4 '17 at 18:08
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Increment a value in Postgres
...olumns, 'name' and 'total', and Bill had a total of 203, what would be the SQL statement I'd use in order to move Bill's total to 204?
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Get bitcoin historical data [closed]
...rom a flat file, which most databases allow you to use (for instance, with SQL Server you can do a BULK INSERT from a CSV file).
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How can I get the domain name of my site within a Django template?
...each RequestContext will call get_current_site(), and therefore execute an SQL query. The wrapper makes sure the variable is only evaluated when it's actually used in the template.
– vdboor
Aug 14 '14 at 9:51
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Purge or recreate a Ruby on Rails database
...acks GTD app db:migrate didn't work. I had to do db:reset when moving from Sqlite3 to Postgres.
– labyrinth
Mar 29 '12 at 4:06
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Can I get Memcached running on a Windows (x64) 64bit environment?
...s a standalone download. Now they have made it part of their commercial No-SQL DB offering called Membase. It can be configured to run in Memcached-only mode (i.e. without persistence) and there's a 100% free version too. Check it out here: http://www.membase.org/downloads
UPDATE 3: MemBase has sle...
No serializer found for class org.hibernate.proxy.pojo.javassist.Javassist?
...e again after this. But it is probably the source of what ended up being a SQL performance nightmare.
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Use different Python version with virtualenv
...d down machine at work with no sudo privileges. Local copies of libraries, SQL databases, languages and compilers galore! Thanks!
– zachd1_618
Jan 24 '13 at 18:03
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How to stop a PowerShell script on the first error?
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Invoking eg: Exec { sqlite3.exe -bail some.db "$SQL" }, the -bail causes an error since it's trying to interpret it as a Cmdlet parameter? Wrapping things in quotes doesn't seem to work. Any ideas?
– rcoup
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Is a GUID unique 100% of the time?
...get duplicate guids. I have two different web servers using two different sql servers. I went to merge the data and found I had 15 million guids and 7 duplicates.
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