大约有 13,000 项符合查询结果(耗时:0.0194秒) [XML]

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What does axis in pandas mean?

...0 means along "indexes". It's a row-wise operation. Suppose, to perform concat() operation on dataframe1 & dataframe2, we will take dataframe1 & take out 1st row from dataframe1 and place into the new DF, then we take out another row from dataframe1 and put into new DF, we repeat this pro...
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Sleep Command in T-SQL?

...(@hours * 60) * 60)) - (@mins * 60) IF @hours > 23 BEGIN select @hours = 23 select @mins = 59 select @secs = 59 -- 'maximum wait time is 23 hours, 59 minutes and 59 seconds.' END declare @sql nvarchar(24) = 'WAITFOR DELAY '+char(39)+cast(@hours as nvarchar(2))...
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Java : How to determine the correct charset encoding of a stream

...ch present you a snippet of the file in different encodings and ask you to select the "correct" one. share | improve this answer | follow | ...
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Extracting hours from a DateTime (SQL Server 2005)

... SELECT DATEPART(HOUR, GETDATE()); DATEPART documentation share | improve this answer | follow ...
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SET NAMES utf8 in MySQL?

... client, thus is also needed when receiving this data, using for example a SELECT statement. – Leopoldo Sanczyk Nov 20 '15 at 20:54 ...
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What is the use of the square brackets [] in sql statements?

... sql also uses square brackets in the like-operator of a select query to limit results using regular expressions. codeproject.com/Articles/33941/SQL-LIKE-Operator – Jens Frandsen Sep 4 '13 at 18:49 ...
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Linux command (like cat) to read a specified quantity of characters

...the chars in line 5 and chars 5 to 8 of line 5, Note: tail -1 is used to select the last line displayed by the head. share | improve this answer | follow | ...
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What are DDL and DML?

...als with data manipulation, and includes most common SQL statements such SELECT, INSERT, UPDATE, DELETE etc, and it is used to store, modify, retrieve, delete and update data in database. SELECT – retrieve data from the a database INSERT – insert data into a table UPDATE – up...
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How do I copy a string to the clipboard on Windows using Python?

... Get contents of clipboard: result = r.selection_get(selection = "CLIPBOARD") – majgis Jul 13 '11 at 3:19 ...
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Viewing complete strings while debugging in Eclipse

...ck on Details pane (the section where the string content is displayed) and select "Max Length..." popup menu. The same length applies to expression inspector popup and few other places. share | im...