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How to automatically select all text on focus in WPF TextBox?

If I call SelectAll from a GotFocus event handler, it doesn't work with the mouse - the selection disappears as soon as mouse is released. ...
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Detect if value is number in MySQL

... This should work in most cases. SELECT * FROM myTable WHERE concat('',col1 * 1) = col1 It doesn't work for non-standard numbers like 1e4 1.2e5 123. (trailing decimal) share ...
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SELECT INTO Variable in MySQL DECLARE causes syntax error?

I´d like to SELECT a single value into a variable. I´d tried to following: 11 Answers ...
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How do I split a string so I can access item x?

...0, PATINDEX('%|%', @products)) SELECT @individual SET @products = SUBSTRING(@products, LEN(@individual + '|') + 1, LEN(@products)) END ELSE BEGIN SET @individu...
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Difference between “read commited” and “repeatable read”

...nd consider you have a simple task like the following: BEGIN TRANSACTION; SELECT * FROM T; WAITFOR DELAY '00:01:00' SELECT * FROM T; COMMIT; That is a simple task that issue two reads from table T, with a delay of 1 minute between them. under READ COMMITTED, the second SELECT may return any da...
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How to create a SQL Server function to “join” multiple rows from a subquery into a single delimited

... If you're using SQL Server 2005, you could use the FOR XML PATH command. SELECT [VehicleID] , [Name] , (STUFF((SELECT CAST(', ' + [City] AS VARCHAR(MAX)) FROM [Location] WHERE (VehicleID = Vehicle.VehicleID) FOR XML PATH ('')), 1, 2, '')) AS Locations FROM [...
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How do I style a dropdown with only CSS?

Is there a CSS-only way to style a <select> dropdown? 24 Answers 24 ...
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Avoid duplicates in INSERT INTO SELECT query in SQL Server

... Using NOT EXISTS: INSERT INTO TABLE_2 (id, name) SELECT t1.id, t1.name FROM TABLE_1 t1 WHERE NOT EXISTS(SELECT id FROM TABLE_2 t2 WHERE t2.id = t1.id) Using NOT IN: INSERT INTO TABLE_2 (id, name) SELECT t1.id, t1....
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Is there an onSelect event or equivalent for HTML ?

I have an input form that lets me select from multiple options, and do something when the user changes the selection. Eg, ...
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Function to Calculate Median in SQL Server

... in all cases. It also requires SQL 2012 or later. DECLARE @c BIGINT = (SELECT COUNT(*) FROM dbo.EvenRows); SELECT AVG(1.0 * val) FROM ( SELECT val FROM dbo.EvenRows ORDER BY val OFFSET (@c - 1) / 2 ROWS FETCH NEXT 1 + (1 - @c % 2) ROWS ONLY ) AS x; Of course, just because o...