大约有 47,000 项符合查询结果(耗时:0.0345秒) [XML]

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How to remove an iOS app from the App Store

... What you need to do is this. Go to “Manage Your Applications” and select the app. Click “Rights and Pricing” (blue button at the top right. Below the availability date and price tier section, you should see a grid of checkboxes for the various countries your app is available in. Click t...
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How important is the order of columns in indexes?

I've heard that you should put columns that will be the most selective at the beginning of the index declaration. Example: ...
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How to select date from datetime column?

...ry. Use BETWEEN or >, <, = operators which allow to use an index: SELECT * FROM data WHERE datetime BETWEEN '2009-10-20 00:00:00' AND '2009-10-20 23:59:59' Update: the impact on using LIKE instead of operators in an indexed column is high. These are some test results on a table with 1,...
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Difference between two dates in MySQL

... SELECT TIMEDIFF('2007-12-31 10:02:00','2007-12-30 12:01:01'); -- result: 22:00:59, the difference in HH:MM:SS format SELECT TIMESTAMPDIFF(SECOND,'2007-12-30 12:01:01','2007-12-31 10:02:00'); -- result: 79259 the differenc...
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Remove Trailing Spaces and Update in Columns in SQL Server

... Try SELECT LTRIM(RTRIM('Amit Tech Corp ')) LTRIM - removes any leading spaces from left side of string RTRIM - removes any spaces from right Ex: update table set CompanyName = LTRIM(RTRIM(CompanyName)) ...
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T-SQL get SELECTed value of stored procedure

...UTPUT parameter and a result set ALSO, watch out if you use the pattern: SELECT @Variable=column FROM table ... if there are multiple rows returned from the query, your @Variable will only contain the value from the last row returned by the query. RETURN VALUE since your query returns an int fie...
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Linq to Entities - SQL “IN” clause

... be used interchangeably depending on your preference: Query Syntax: var selected = from u in users where new[] { "Admin", "User", "Limited" }.Contains(u.User_Rights) select u foreach(user u in selected) { //Do your stuff on each selected user; } Method Syntax:...
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How can I increase the cursor speed in terminal? [closed]

...rticle.php?story=20090823193018149 To summarize, open up a Terminal window and type the following command: defaults write NSGlobalDomain KeyRepeat -int 0 More detail from the article: Everybody knows that you can get a pretty fast keyboard repeat rate by changing a slider on the Keyboard tab of th...
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How can I confirm a database is Oracle & what version it is using SQL?

I'm building an installer for an application. The user gets to select a datasource they have configured and nominate what type of database it is. I want to confirm that the database type is indeed Oracle, and if possible, what version of Oracle they are running by sending a SQL statement to the dat...
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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: ...