大约有 40,000 项符合查询结果（耗时：0.0629秒） [XML]
MySQL: Invalid use of group function
... Rewrite your subquery as:
( -- where that pid is in the set:
SELECT c2.pid -- of pids
FROM Catalog AS c2 -- from catalog
WHERE c2.pid = c1.pid
HAVING COUNT(c2.sid) >= 2)
sh...
Is there a way to @Autowire a bean that requires constructor arguments?
... Thanks for the tip, but I don't understand how that relates to setting the constructor arg for the injected bean. From what I can tell from the spring docs, it is good for setting default values, but doesn't specify how to pass a constructor arg.
– Eric B.
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PostgreSQL - fetch the row which has the Max value for a column
...and running "Query/Explain (F7)" on the query with "Query/Explain options" set to "Analyze"
Quassnoy's query has a cost estimate of 745k (!), and completes in 1.3 seconds (given a compound index on (usr_id, trans_id, time_stamp))
Bill's query has a cost estimate of 93k, and completes in 2.9 second...
Cannot refer to a non-final variable inside an inner class defined in a different method
... keep updating the values with every iteration through the timer. I cannot set the values to final as that will prevent me from updating the values however I am getting the error I describe in the initial question below:
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Browser support for URLs beginning with double slash
...ror page. I suspect a proxy or VPN or firewall security configuration they set internally. After updating the URL to use the https protocol, everything works fine.
– TwystO
Jan 10 '18 at 14:14
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Cassandra port usage - how are the ports used?
...ra 2.0.8 onward according to this ticket. The default cassandra-env.sh now sets the com.sun.management.jmxremote.rmi.port property to the same value as the main JMX port so that random ports are not used.
– ches
Dec 18 '14 at 11:32
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How to set breakpoints in inline Javascript in Google Chrome?
...rofiles, Timelines, and Audits, but basic functionality like being able to set breakpoints both in js files and within html and javascript code is missing! I tried to use the javascript console, which itself is buggy - for example, once it encounters a JS error, I cannot get out of it unless I refre...
Where can I learn how to write C code to speed up slow R functions? [closed]
...l and do not hold back. We know we are short documentation -- but a fresh set of eyes could help tremendously.
– Dirk Eddelbuettel
Nov 5 '10 at 14:50
6
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sed command with -i option failing on Mac, but works on Linux
... with brew:
brew install gnu-sed
and use as
gsed SED_COMMAND
you can set as well set sed as alias to gsed (if you want):
alias sed=gsed
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How can I transition height: 0; to height: auto; using CSS?
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Use max-height in the transition and not height. And set a value on max-height to something bigger than your box will ever get.
See JSFiddle demo provided by Chris Jordan in another answer here.
#menu #list {
max-height: 0;
transition: max-height 0.15s ease-out;...