大约有 40,000 项符合查询结果(耗时:0.0530秒) [XML]

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How can I do SELECT UNIQUE with LINQ?

...at goes in the .OrderBy() parameters. You have name=>name. Is that name coming from the column name in the DB? Because we have dbo.Color.Name then just name=>name which hints to me it is not the column name ? Bizarre it also sorts properly if I just change that to .OrderBy(a=>a) ...
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What is a “Bitmap heap scan” in a query plan?

... The best explanation comes from Tom Lane, which is the algorithm's author unless I'm mistaking. See also the wikipedia article. In short, it's a bit like a seq scan. The difference is that, rather than visiting every disk page, a bitmap index sc...
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SQL set values of one column equal to values of another column in the same table

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MongoDB - Update objects in a document's array (nested updating)

... @skmahawar regarding the 3rd and 4th params, docs.mongodb.com/manual/reference/method/db.collection.update indicates these options are for "upsert" and "multi" respectively. For upsert, if set to true, creates a new document when no document matches the query criteria. The default ...
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How to check if an intent can be handled from some activity?

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TextView bold via xml file?

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Incompatible implicit declaration of built-in function ‘malloc’

... ahh thanks :) still getting the hang of C, first C program coming from java :) – SGE Aug 13 '11 at 13:53 ...
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TypeScript type signatures for functions with variable argument counts

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What are the differences between .gitignore and .gitkeep?

...isn’t documented, because it’s not a feature of Git. Git cannot add a completely empty directory. People who want to track empty directories in Git have created the convention of putting files called .gitkeep in these directories. The file could be called anything; Git assigns no special signif...
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Parcelable where/when is describeContents() used?

...tween processes. Please take a look at InputChannel.java (class describing comment) and android_os_Parcel.cpp – Ognyan Jan 27 '15 at 11:31 ...