大约有 20,000 项符合查询结果（耗时：0.0319秒） [XML]
Select first row in each GROUP BY group?
...OW_NUMBER() OVER(PARTITION BY p.customer
ORDER BY p.total DESC) AS rk
FROM PURCHASES p)
SELECT s.*
FROM summary s
WHERE s.rk = 1
Supported by any database:
But you need to add logic to break ties:
SELECT MIN(x.id), -- change to MAX if you want the hi...
How do I migrate a model out of one django app and into a new one?
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In order to access orm['contenttypes.contenttype'], you also need to add the --freeze contenttypes option to your schemamigration commands.
– Gary
Dec 5 '13 at 18:21
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Android Studio says “cannot resolve symbol” but project compiles
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Try changing the order of dependencies in File > Project Structure > (select your project) > Dependencies.
Invalidate Caches didn't work for me, but moving my build from the bottom of the list to the top did.
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libpthread.so.0: error adding symbols: DSO missing from command line
... \
-lrt -lm -lpthread
Explanation: the linking is dependent on the order of modules. Symbols are first requested, and then linked in from a library that has them. So you have to specify modules that use libraries first, and libraries after them. Like this:
gcc x.o y.o z.o -la -lb -lc
More...
mysql -> insert into tbl (select from another table) and some default values [duplicate]
... you can do something like this:
INSERT INTO course_payment
SELECT NULL, order_id, payment_gateway, total_amt, charge_amt, refund_amt, NOW()
FROM orders ORDER BY order_id DESC LIMIT 10;
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AngularJS sorting by property
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AngularJS' orderBy filter does just support arrays - no objects. So you have to write an own small filter, which does the sorting for you.
Or change the format of data you handle with (if you have influence on that). An array containin...
https connection using CURL from command line
...e call to allow insecure connections.
curl -k https://whatever.com/script.php
Edit: I discovered the root of the problem. I was using an SSL certificate (from StartSSL, but I don't think that matters much) and hadn't set up the intermediate certificate properly. If you're having the same problem ...
Get the first key name of a javascript object [duplicate]
..." key in a hash (Javascript calls them objects). They are fundamentally unordered. Do you mean just choose any single key:
for (var k in ahash) {
break
}
// k is a key in ahash.
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How do I use regex in a SQLite query?
...ction named "regexp" is added at run-time, that function will be called in order to implement the REGEXP operator. (sqlite.org/lang_expr.html#regexp)
– radicand
Jan 7 '12 at 0:49
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SHA512 vs. Blowfish and Bcrypt [closed]
...s stored in the "password" table, but the derived key is never stored.
In order to break the cryptography here, an attacker would have to recover the key from the ciphertext. This is called a "known-plaintext" attack, since the attack knows the magic string that has been encrypted, but not the key ...