大约有 47,000 项符合查询结果(耗时:0.0343秒) [XML]

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Can you have if-then-else logic in SQL? [duplicate]

I need to do select data from a table based on some kind of priority like so: 7 Answers ...
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Simple way to calculate median with MySQL

... In MariaDB / MySQL: SELECT AVG(dd.val) as median_val FROM ( SELECT d.val, @rownum:=@rownum+1 as `row_number`, @total_rows:=@rownum FROM data d, (SELECT @rownum:=0) r WHERE d.val is NOT NULL -- put some where clause here ORDER BY d.val ) ...
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jQuery - setting the selected value of a select control via its text description

I have a select control, and in a javascript variable I have a text string. 21 Answers ...
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Simplest way to do a recursive self-join?

... WITH q AS ( SELECT * FROM mytable WHERE ParentID IS NULL -- this condition defines the ultimate ancestors in your chain, change it as appropriate UNION ALL SELECT m.* FROM mytable m ...
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How to select a drop-down menu value with Selenium using Python?

I need to select an element from a drop-down menu. 13 Answers 13 ...
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How to drop all tables in a SQL Server database?

...VARCHAR(500) DECLARE @Cursor CURSOR SET @Cursor = CURSOR FAST_FORWARD FOR SELECT DISTINCT sql = 'ALTER TABLE [' + tc2.TABLE_SCHEMA + '].[' + tc2.TABLE_NAME + '] DROP [' + rc1.CONSTRAINT_NAME + '];' FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS rc1 LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS t...
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problem with and :after with CSS in WebKit

I would like to add some style on a select box with the pseudo :after (to style my select box with 2 parts and without images). Here's the HTML: ...
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Caveats of select/poll vs. epoll reactors in Twisted

...o based apps ) leads me to believe that ePoll is a natural replacement for Select and Poll based networking, especially with Twisted. Which makes me paranoid, its pretty rare for a better technique or methodology not to come with a price. ...
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XML Schema minOccurs / maxOccurs default values

...ml> <body> <xsl:for-each select="country"> <xsl:value-of select="countryName"/><br/> <xsl:value-of select="capital"/><br/> <xsl:value-of select="nation...
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UITableView Setting some cells as “unselectable”

How can I set the UITableView's cell property to be unselectable? I don't want to see that blue selection box when the user taps on the cell. ...