大约有 43,000 项符合查询结果(耗时:0.0414秒) [XML]

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What is the difference between JOIN and JOIN FETCH when using JPA and Hibernate

...ent attribute. Otherwise, (valid at least for PG) you might get ERROR: for SELECT DISTINCT, ORDER BY expressions must appear in select list – long Apr 21 at 14:08 add a commen...
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What is the correct file extension for GLSL shaders? [closed]

...haders. You can store the vertex shader and fragment shader content in a char * variable and compile, link and attach the shader to a program. Another way is to write the seperate vertex and fragment shader file with whatever extension you like and read it to compile, link and attach the shader t...
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How to get the first and last date of the current year?

... SELECT DATEADD(yy, DATEDIFF(yy, 0, GETDATE()), 0) AS StartOfYear, DATEADD(yy, DATEDIFF(yy, 0, GETDATE()) + 1, -1) AS EndOfYear The above query gives a datetime value for midnight at the beginning of December 31. This ...
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Select the values of one property on all objects of an array in PowerShell

... I think you might be able to use the ExpandProperty parameter of Select-Object. For example, to get the list of the current directory and just have the Name property displayed, one would do the following: ls | select -Property Name This is still returning DirectoryInfo or FileInfo obje...
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Referring to a Column Alias in a WHERE Clause

... SELECT logcount, logUserID, maxlogtm, DATEDIFF(day, maxlogtm, GETDATE()) AS daysdiff FROM statslogsummary WHERE ( DATEDIFF(day, maxlogtm, GETDATE() > 120) Normally you can't refer to field aliases in the WHERE clau...
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tmux set -g mouse-mode on doesn't work

...n. There's now no longer options for: - mouse-resize-pane - mouse-select-pane - mouse-select-window - mode-mouse Instead there is just one option: 'mouse' which turns on mouse support So this is what I'm using now in my .tmux.conf file set -g mouse on ...
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How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]

...countries values ('Andorra'); insert into countries values ('Antigua'); SELECT SUBSTR (SYS_CONNECT_BY_PATH (country_name , ','), 2) csv FROM (SELECT country_name , ROW_NUMBER () OVER (ORDER BY country_name ) rn, COUNT (*) OVER () cnt FROM countries) WHE...
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Any gotchas using unicode_literals in Python 2.6?

..., the clearer the code is, since what you want is to manipulate strings of characters, not arrays of bytes with an externally implied encoding. – Eric O Lebigot Sep 3 '10 at 12:35 ...
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Best way to test SQL queries [closed]

...value, and all values are consecutive: create view cm_absolute_month as select *, year * 12 + month as absolute_month from month_value; Now what we have to test is inherent in our spec, namely that for any tuple (year, month), there is one and only one (absolute_month), and that (absolute_month...
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Selecting/excluding sets of columns in pandas [duplicate]

...e to create views or dataframes from an existing dataframe based on column selections. 9 Answers ...