大约有 47,000 项符合查询结果(耗时:0.0673秒) [XML]

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PostgreSQL: insert from another table

... Just supply literal values in the SELECT: INSERT INTO TABLE1 (id, col_1, col_2, col_3) SELECT id, 'data1', 'data2', 'data3' FROM TABLE2 WHERE col_a = 'something'; A select list can contain any value expression: But the expressions in the select list do...
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Is there a CSS parent selector?

How do I select the <li> element that is a direct parent of the anchor element? 33 Answers ...
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How to auto-indent code in the Atom editor?

...auto-indent your code in the Atom editor? In other editors you can usually select some code and auto-indent it. 11 Answers...
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Difference between View and table in sql

... A table contains data, a view is just a SELECT statement which has been saved in the database (more or less, depending on your database). The advantage of a view is that it can join data from several tables thus creating a new view of it. Say you have a database w...
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MySQL IF NOT NULL, then display 1, else display 0

... SELECT c.name, IF(a.addressid IS NULL,0,1) AS addressexists FROM customers c LEFT JOIN addresses a ON c.customerid = a.customerid WHERE customerid = 123 ...
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How to see full query from SHOW PROCESSLIST

... pull the data and look at 'INFO' column which contains the whole query : select * from INFORMATION_SCHEMA.PROCESSLIST where db = 'somedb'; You can add any condition or ignore based on your requirement. The output of the query is resulted as : +-------+------+-----------------+--------+--------...
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SQL Group By with an Order By

... In all versions of MySQL, simply alias the aggregate in the SELECT list, and order by the alias: SELECT COUNT(id) AS theCount, `Tag` from `images-tags` GROUP BY `Tag` ORDER BY theCount DESC LIMIT 20 share ...
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ng-options with simple array init

... You actually had it correct in your third attempt. <select ng-model="myselect" ng-options="o as o for o in options"></select> See a working example here: http://plnkr.co/edit/xEERH2zDQ5mPXt9qCl6k?p=preview The trick is that AngularJS writes the keys as numbers from...
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Warning: Null value is eliminated by an aggregate or other SET operation in Aqua Data Studio

...t the solution specifically for the "opencases" column be simpler as just "select count(1)..." (or "count" of any other literal)? The Where clause already specifies "and closed is NULL" so no need for summing a case statement in this instance. Also, I've heard (aeons ago) that "count(*)" is not as e...
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jQuery - selecting elements from inside a element

... Actually, $('#id', this); would select #id at any descendant level, not just the immediate child. Try this instead: $(this).children('#id'); or $("#foo > #moo") or $("#foo > span") ...