大约有 47,000 项符合查询结果(耗时:0.0307秒) [XML]

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Generating a random & unique 8 character string using MySQL

...umn: INSERT INTO vehicles VALUES (blah); -- leaving out the number plate SELECT @lid:=LAST_INSERT_ID(); UPDATE vehicles SET numberplate=concat( substring('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', rand(@seed:=round(rand(@lid)*4294967296))*36+1, 1), substring('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'...
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How to 'insert if not exists' in MySQL?

... Solution: INSERT INTO `table` (`value1`, `value2`) SELECT 'stuff for value1', 'stuff for value2' FROM DUAL WHERE NOT EXISTS (SELECT * FROM `table` WHERE `value1`='stuff for value1' AND `value2`='stuff for value2' LIMIT 1) Explanation: The innermost query SELECT *...
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Adding devices to team provisioning profile

...e.com Add the UDID in devices Go back to XCode, open up the Organizer and select "Provisioning Profiles", ensure that "Automatic Device Provisioning" is checked on the top right pane, then click on the "Refresh" button, and magically all your devices set in the provisioning portal will be automati...
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How do I check if an index exists on a table field in MySQL?

... Try: SELECT * FROM information_schema.statistics WHERE table_schema = [DATABASE NAME] AND table_name = [TABLE NAME] AND column_name = [COLUMN NAME] It will tell you if there is an index of any kind on a certain column wi...
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How can I select an element by name with jQuery?

... You can use the jQuery attribute selector: $('td[name ="tcol1"]') // matches exactly 'tcol1' $('td[name^="tcol"]' ) // matches those that begin with 'tcol' $('td[name$="tcol"]' ) // matches those that end with 'tcol' $('td[name*="tcol"]' ) // matche...
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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?

...and re-try where necessary. Some attempted solutions also fail to consider SELECT races. If you try the obvious and simple: -- THIS IS WRONG. DO NOT COPY IT. It's an EXAMPLE. BEGIN; UPDATE testtable SET somedata = 'blah' WHERE id = 2; -- Remember, this is WRONG. Do NOT COPY IT. INSERT INTO testt...
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MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)

...=/tmp/mysql-5.5.sock Welcome to the MySQL monitor (...) mysql> SELECT user, host FROM mysql.user; +------+-----------+ | user | host | +------+-----------+ | bill | % | | root | 127.0.0.1 | | root | ::1 | | root | localhost | +------+---...
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How to select label for=“XYZ” in CSS?

... The selector would be label[for=email], so in CSS: label[for=email] { /* ...definitions here... */ } ...or in JavaScript using the DOM: var element = document.querySelector("label[for=email]"); ...or in JavaScript using...
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Eclipse doesn't highlight references anymore

... If none of comments above worked, uncheck "Mark occurrences of the selected element in the current file" > Apply > OK. Go back to preferences, check "Mark occurrences of the selected element in the current file" > Apply > OK. – realPK Feb 4 ...
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How to do what head, tail, more, less, sed do in Powershell? [closed]

...option for reading a text file. You can then filter further: gc log.txt | select -first 10 # head gc -TotalCount 10 log.txt # also head gc log.txt | select -last 10 # tail gc -Tail 10 log.txt # also tail (since PSv3), also much faster than above option gc log.txt | more #...