大约有 47,000 项符合查询结果(耗时:0.0390秒) [XML]

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How to show the last queries executed on MySQL?

...the result in this way, but parameters are present by question mark, e.g., select foo from bar where x=?. How can I get the complete query? – petertc Nov 4 '15 at 5:52 ...
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What is the difference between declarative and imperative programming? [closed]

...rary/bb397906.aspx for examples, from item in collection where item%2 != 0 select item would be the declarative form. Calling a function doesn't become declarative programming just because that function is in the System.Linq namespace. – Pete Kirkham Aug 28 '15...
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Why do you need to create a cursor when querying a sqlite database?

...les traversal over the records in a database". For example c.execute('''SELECT * FROM users''') returns an iterator that you can call fetchall() on (or another cursor method). Some SQL queries return empty iterators, but that should be expected, not surprising. – Powers ...
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How do I set the size of Emacs' window?

... got the following in my .emacs: (if (window-system) (set-frame-height (selected-frame) 60)) You might also look at the functions set-frame-size, set-frame-position, and set-frame-width. Use C-h f (aka M-x describe-function) to bring up detailed documentation. I'm not sure if there's a way to ...
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Check if a string is null or empty in XSLT

... How can I translate <xsl:for-each select="root/*[matches(name(.), 'grp')]"> so it can be used in VS2010? – Si8 Oct 28 '15 at 17:21 ...
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android pick images from gallery

....ACTION_GET_CONTENT); startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE); Don't forget also to create the constant PICK_IMAGE, so you can recognize when the user comes back from the image gallery Activity: public static final int PICK_IMAGE = 1; @Override public v...
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How to save CSS changes of Styles panel of Chrome Developer Tools?

...oper Tools, Right-click in the left panel (where the files are listed) and select Add Folder to Workspace. You can get to a stylesheet in the Sources panel quickly by clicking the stylesheet at the top-right of each CSS rule for a selected element in the Elements panel. After adding the folder,...
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How to convert linq results to HashSet or HashedSet

...f T explicitly: var query = from i in Enumerable.Range(0, 10) select new { i, j = i + 1 }; var resultSet = query.ToHashSet(); You can't do that with an explicit call to the HashSet<T> constructor. We're relying on type inference for generic methods to do it for us. Now you coul...
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How to set a default value for an existing column

...able and found this way to check if it had been done already... IF EXISTS(SELECT * FROM information_schema.columns WHERE table_name='myTable' AND column_name='myColumn' AND Table_schema = 'myDBO' AND column_default IS NULL) BEGIN ALTER TABLE [myDBO].[myTable] ADD DEFAULT 0 FOR [myColumn] END ...
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Update or Insert (multiple rows and columns) from subquery in PostgreSQL

...table.col1 = 123; For the INSERT Use: INSERT INTO table1 (col1, col2) SELECT col1, col2 FROM othertable You don't need the VALUES syntax if you are using a SELECT to populate the INSERT values. share | ...