大约有 47,000 项符合查询结果(耗时:0.0397秒) [XML]

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Can I use CASE statement in a JOIN condition?

...ns a value from the THEN portion of the clause. You could use it thusly: SELECT * FROM sys.indexes i JOIN sys.partitions p ON i.index_id = p.index_id JOIN sys.allocation_units a ON CASE WHEN a.type IN (1, 3) AND a.container_id = p.hobt_id THEN 1 ...
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How can I split and trim a string into parts all on one line?

... Try List<string> parts = line.Split(';').Select(p => p.Trim()).ToList(); FYI, the Foreach method takes an Action (takes T and returns void) for parameter, and your lambda return a string as string.Trim return a string Foreach extension method is meant to modif...
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A generic list of anonymous class

... okay cool, now we need an example of replacing the new {} lines with a select statement. var list = sourceList.Select( o => new { o.ModelId, ...
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What is LINQ and what does it do? [closed]

...;string> result = from c in myCustomers where c.Name.StartsWith("B") select c.Name; Lambda Expressions - This is a shorthand for specifying a method. The C# compiler will translate each into either an anonymous method or a true System.Linq.Expressions.Expression. You really need to understand...
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What is SELF JOIN and when would you use it? [duplicate]

...et information for both people in one row, you could self join like this: select e1.EmployeeID, e1.FirstName, e1.LastName, e1.SupervisorID, e2.FirstName as SupervisorFirstName, e2.LastName as SupervisorLastName from Employee e1 left outer join Employee e2 on e1.SupervisorID ...
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JPA eager fetch does not join

... JPA doesn't provide any specification on mapping annotations to select fetch strategy. In general, related entities can be fetched in any one of the ways given below SELECT => one query for root entities + one query for related mapped entity/collection of each root entity = (n+1) que...
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How to undo another user’s checkout in TFS?

...t-clicking the desired project, folder, or file in Source Control Explorer Select Properties Select the Security tab Select the appropriate user or group in the Users and Groups section at the top View the "Permissions for [user/group]:" section at the bottom Deleting the workspace tf workspace /...
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Why does MYSQL higher LIMIT offset slow the query down?

...h more than 16 million records [2GB in size]. The higher LIMIT offset with SELECT, the slower the query becomes, when using ORDER BY *primary_key* ...
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Extracting specific columns in numpy array

... I assume you wanted columns 1 and 9? To select multiple columns at once, use X = data[:, [1, 9]] To select one at a time, use x, y = data[:, 1], data[:, 9] With names: data[:, ['Column Name1','Column Name2']] You can get the names from data.dtype.names… ...
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How to check all checkboxes using jQuery?

...}); Html should be : Single check box on checked three checkbox will be select and deselect. <input type="checkbox" name="checkedAll" id="checkedAll" /> <input type="checkbox" name="checkAll" class="checkSingle" /> <input type="checkbox" name="checkAll" class="checkSingle" /> ...