大约有 13,072 项符合查询结果（耗时：0.0342秒） [XML]
Select rows which are not present in other table
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There are basically 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM login_log l
WHERE NOT EXISTS (
SELECT -- SELECT list mostly irrelevant; can just be empty in Postgres
FROM i...
DataContractSerializer doesn't call my constructor?
I just realized something crazy, which I assumed to be completely impossible : when deserializing an object, the DataContractSerializer doesn't call the constructor !
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A simple command line to download a remote maven2 artifact to the local repository?
I have a library that I distribute using maven 2. The typical user of this library doesn't use maven to build their applications, but is likely somewhat familiar with maven and probably has it installed.
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Loading existing .html file with android WebView
I did try samples, demos from Google codes and other resources with WebView , but when i try to do it in my own code, it doesn't work for me.
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Linq order by boolean
I've got a linq query that I want to order by f.bar, which is a string, but I also want to order it by f.foo, which is a boolean field, first. Like the query below.
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PostgreSQL delete all content
Hello I want to delete all data in my postgresql tables, but not the table itself.
How could I do this?
3 Answers
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Angularjs if-then-else construction in expression
Can I somehow use if-then-else construction (ternary-operator) in angularjs expression, for example I have function $scope.isExists(item) that has to return bool value.
I want something like this,
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cmake and libpthread
I'm running RHEL 5.1 and use gcc .
3 Answers
3
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Select statement to find duplicates on certain fields
Can you help me with SQL statements to find duplicates on multiple fields?
7 Answers
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How to create a function in a cshtml template?
I need to create a function that is only necessary inside one cshtml file. You can think of my situation as ASP.NET page methods, which are min web services implemented in a page, because they're scoped to one page. I know about HTML helpers (extension methods), but my function is just needed in one...