大约有 47,000 项符合查询结果(耗时:0.0241秒) [XML]

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Linq Syntax - Selecting multiple columns

... .Where(x => x.EMAIL == givenInfo || x.USER_NAME == givenInfo) .Select(x => new { x.EMAIL, x.ID }); AFAIK, the declarative LINQ syntax is converted to a method call chain similar to this when it is compiled. UPDATE If you want the entire object, then you just have to omit the call ...
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When to use Common Table Expression (CTE)

...ing well? Can someone give me a simple example of limitations with regular select, derived or temp table queries to make the case of CTE? Any simple examples would be highly appreciated. ...
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SQL Server loop - how do I loop through a set of records

how do I loop through a set of records from a select? 8 Answers 8 ...
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LINQ Using Max() to select a single row

I'm using LINQ on an IQueryable returned from NHibernate and I need to select the row with the maximum value(s) in a couple of fields. ...
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Removing leading zeroes from a field in a SQL statement

... VARCHAR(10) field. So, for example, if the field contains '00001A', the SELECT statement needs to return the data as '1A'. ...
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How do you create a random string that's suitable for a session ID in PostgreSQL?

...sion verification using PostgreSQL. I know I can get a random number with SELECT random() , so I tried SELECT md5(random()) , but that doesn't work. How can I do this? ...
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How do you select a particular option in a SELECT element in jQuery?

... A selector to get the middle option-element by value is $('.selDiv option[value="SEL1"]') For an index: $('.selDiv option:eq(1)') For a known text: $('.selDiv option:contains("Selection 1")') EDIT: As commented above t...
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How can you programmatically tell an HTML SELECT to drop down (for example, due to mouseover)?

How can you programmatically tell an HTML select to drop down (for example, due to mouseover)? 12 Answers ...
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Android Spinner: Get the selected item change event

How can you set the event listener for a Spinner when the selected item changes? 16 Answers ...
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How do you create a read-only user in PostgreSQL?

I'd like to create a user in PostgreSQL that can only do SELECTs from a particular database. In MySQL the command would be: ...