大约有 40,000 项符合查询结果(耗时:0.0303秒) [XML]

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Difference between JOIN and INNER JOIN

...nal, or you can specify CROSS JOIN. OR For an inner join, the syntax is: SELECT ... FROM TableA [INNER] JOIN TableB (in other words, the "INNER" keyword is optional - results are the same with or without it) share ...
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Getting current device language in iOS?

... will actually return the current region of the device - not the currently selected language. These are often one and the same. However, if I am in North America and I set my language to Japanese, my region will still be English (United States). In order to retrieve the currently selected language, ...
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How to delete all rows from all tables in a SQL Server database?

...t: DECLARE @Nombre NVARCHAR(MAX); DECLARE curso CURSOR FAST_FORWARD FOR Select Object_name(object_id) AS Nombre from sys.objects where type = 'U' OPEN curso FETCH NEXT FROM curso INTO @Nombre WHILE (@@FETCH_STATUS <> -1) BEGIN IF (@@FETCH_STATUS <> -2) BEGIN DECLARE @statement NVARC...
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How to select first parent DIV using jQuery?

... Use .closest() to traverse up the DOM tree up to the specified selector. var classes = $(this).parent().closest('div').attr('class').split(' '); // this gets the parent classes. share | ...
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Accessing an SQLite Database in Swift

...pared statement: \(errmsg)") } statement = nil Prepare new statement for selecting values from table and loop through retrieving the values: if sqlite3_prepare_v2(db, "select id, name from test", -1, &statement, nil) != SQLITE_OK { let errmsg = String(cString: sqlite3_errmsg(db)!) pri...
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Is there a better way to express nested namespaces in C++ within the header

...A_HELPER_EXPAND(VA_COUNT_HELPER(__VA_ARGS__, 6, 5, 4, 3, 2, 1)) #define VA_SELECT_CAT(_Name, _Count, ...) VA_HELPER_EXPAND(_Name##_Count(__VA_ARGS__)) #define VA_SELECT_HELPER(_Name, _Count, ...) VA_SELECT_CAT(_Name, _Count, __VA_ARGS__) #define VA_SELECT(_Name, ...) VA_SE...
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How to select the nth row in a SQL database table?

I'm interested in learning some (ideally) database agnostic ways of selecting the n th row from a database table. It would also be interesting to see how this can be achieved using the native functionality of the following databases: ...
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Getting result of dynamic SQL into a variable for sql-server

... varchar(75) declare @counts int SET @city = 'New York' SET @sqlCommand = 'SELECT @cnt=COUNT(*) FROM customers WHERE City = @city' EXECUTE sp_executesql @sqlCommand, N'@city nvarchar(75),@cnt int OUTPUT', @city = @city, @cnt=@counts OUTPUT select @counts as Counts ...
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How can I view live MySQL queries?

... As far as I can tell, there is no way to trigger anything on a SELECT statement. Triggers only apply to INSERT, UPDATE, DELETE... or am I misinformed? – gabe. Dec 8 '11 at 21:14 ...
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Xcode/Simulator: How to run older iOS version?

...e simulator from 3.2 onwards after upgrading. In the iPhone Simulator try selecting Hardware -> Version -> 3.2 share | improve this answer | follow | ...