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How to update SQLAlchemy row entry?
...ns. Instead use user.no_of_logins = user.no_of_logins + 1. Translated into sql the latter correct way becomes: SET no_of_logins = no_of_logins + 1.
– ChaimG
Jul 14 '16 at 20:19
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What is this operator in MySQL?
...d and therefore supported on other databases, unlike <=>, which is MySQL-specific.
You can think of them as specialisations of MySQL's <=>:
'a' IS NULL ==> 'a' <=> NULL
'a' IS NOT NULL ==> NOT('a' <=> NULL)
Based on this, your particular query (fragment) can be con...
MongoDB and “joins” [duplicate]
...in since the relationship will only be evaluated when needed. A join (in a SQL database) on the other hand will resolve relationships and return them as if they were a single table (you "join two tables into one").
You can read more about DBRef here:
http://docs.mongodb.org/manual/applications/data...
Effect of NOLOCK hint in SELECT statements
... about it by a colleague and my initial research made me question myself. SQLServer 2005 documentation says that with NOLOCK is the default locking scheme for all select statements! I'd guess then that my hints would be redundant in ...
– Bob Probst
Oct 16 '0...
phpmyadmin logs out after 1440 secs
In my local development Ubuntu box I use MySQL and phpmyadmin to work with the database.
24 Answers
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Throw an error in a MySQL trigger
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As of MySQL 5.5, you can use the SIGNAL syntax to throw an exception:
signal sqlstate '45000' set message_text = 'My Error Message';
State 45000 is a generic state representing "unhandled user-defined exception".
Here is a more...
华为公司的新产品研发流程管理 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...化的条件反射。这样的产品一般会有太多的甚至是不利的性能，因而不能处于有利的竞争地位。产品的定义也是随机的，不能成为一个有机战略的一部分。其结果是，各个产品相互拼凑，不能形成一条一体化的产品线。
产...
现实版《道士下山》：道长老梁的四面人生 - 轻松一刻 - 清泛网 - 专注C/C++...
...个真实自在的自己，开心快乐，坦然面对生活。”
即便包括父亲在内的家人，并不理解他选择出家，甚至还有异样的眼光，但“他知道我不是在做坏事害人，他就满意了”。
其实，老梁还有个目标远大的“理想”，希望有一...
How can I put a database under git (version control)?
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PostGreSQL database files are binary files, feel free to put them in your git repository, you just won't be able to do any diffs on them, and any changes will most likely change the whole database and thus you now have to send the f...
PostgreSQL: How to make “case-insensitive” query
Is there any way to write case-insensitive queries in PostgreSQL, E.g. I want that following 3 queries return same result.
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