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90后创业四年:曾经觉得不公 后来愿赌服输 - 资讯 - 清泛网 - 专注C/C++及内核技术
...流量，我觉得很不公平。
后来我反思总结了一下，这种使用场景，不应该站在技术人员的角度来看，而是应该站在产品经理的角度来看。这类产品对用户来讲只是娱乐的需求，用户其实不太关心准不准确，只是哈哈一笑。我用...
Two-way encryption: I need to store passwords that can be retrieved
... keys can be compromised without the data being compromised. If there's a SQL Injection attack, they can get the $userKey, but not the other 2. If there's a local server exploit, they can get $userKey and $serverKey, but not the third $userSuppliedKey. If they go beat the user with a wrench, they...
How to get a list of user accounts using the command line in MySQL?
I'm using the MySQL command line utility and can navigate through a database. Now I need to see a list of user accounts. How can I do this?
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Removing index column in pandas when reading a csv
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Using df.to_sql("table",cursor,if_exists="append",index=False) also fixes the sqlite error sqlite3.OperationalError: table message has no column named index
– Anna
Jun 3 '18 at 0:55
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How to do INSERT into a table records extracted from another table
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Remove VALUES from your SQL.
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How to create an array for JSON using PHP?
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I have this code while($row=mysql_fetch_assoc($query_insert)) { $control=array('regione'=>$row["regione"],'totale'=>$row["prezzi"]); } print (json_encode(%control)); but retun {"regione":"Puglia","totale":"5.15"} not [{..},{..}]
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Best way to check for nullable bool in a condition expression (if …)
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IsTrue() | IsNull().. :) I reproduced logic how SQL works with nulls. I think it is the most clean and understandable syntax.
– Andrey Frolov
Apr 20 '10 at 9:51
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How do I convert from BLOB to TEXT in MySQL?
I have a whole lot of records where text has been stored in a blob in MySQL. For ease of handling I'd like to change the format in the database to TEXT... Any ideas how easily to make the change so as not to interrupt the data - I guess it will need to be encoded properly?
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What is the reason for having '//' in Python? [duplicate]
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Python's 2 approach to "/" is not really bad. In SQL, we have to deal with it as well. Its common to see (0.0+variable1)/variable2 or 1.0*variable1/variable2
– Chris
Oct 28 '15 at 13:42
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Distinct in Linq based on only one field of the table
...able out, you will only get those items. If you are talking about LINQ to SQL, then yes, this will do a table scan.
– PRMan
May 11 '17 at 16:00
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