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AWS MySQL RDS vs AWS DynamoDB [closed]
I've been using MySQL for a fair while now and I'm comfortable with its structure & SQL Queries etc.
4 Answers
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Cannot use identity column key generation with ( TABLE_PER_CLASS )
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Is this issue is with MySql only or its regular as I watch one of a video for Table per class approach and it was working fine in that postgres was used
– Prashant
Jan 22 '14 at 5:47
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SQL (MySQL) vs NoSQL (CouchDB) [closed]
...then things like a lot of their messages, comments etc. I have always used MySQL before but now I am minded to try something new like couchdb or similar which is not SQL.
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Discuz! X3 论坛标题字数突破80的限制 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... _forum_rsscache, _forum_thread 这三张表）：
下面详细介绍如何修改：
一、数据库修改，修改数据库标题字段的长度为255字符：运行下面的sql语句：
（注意修改你的表的前缀，还有修改前一定要备份！！！）
ALTER TABLE `pre_forum...
In MySQL what does “Overhead” mean, what is bad about it, and how to fix it?
...g
index paths, defragmenting, etc. is
what is known as OPTIMIZATION in mysql
and other terms in other databases.
For example, IBM DB2/400 calls it
REORGANIZE PHYSICAL FILE MEMBER.
It's kind of like changing the oil in
your car or getting a tune-up. You may
think you really don't h...
How does MySQL process ORDER BY and LIMIT in a query?
... @Green, you're mistaken. Read this for the explanation: dev.mysql.com/doc/refman/5.7/en/limit-optimization.html When the ORDER BY column is indexed, it may return records in a different order than without the LIMIT, when there are more than 1 records with the same value in that column...
Are duplicate keys allowed in the definition of binary search trees?
...a BST which allows either of the right or left children to be equal to the root node, will require extra computational steps to finish a search where duplicate nodes are allowed.
It is best to utilize a list at the node to store duplicates, as inserting an '=' value to one side of a node requires r...
MySQL's now() +1 day
I'm using now() in MySQL query.
4 Answers
4
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What are the best PHP input sanitizing functions?
...to the server. If you haven't worked with PDO before here's a pretty good MySQL-oriented tutorial.
Some SQL databases have their own specialty extensions in PHP, including SQL Server, PostgreSQL and SQLite 3. Each of those extensions has prepared statement support that operates in the same prepare...
JAVA线程池管理及分布式HADOOP调度框架搭建 - 人工智能(AI) - 清泛IT社区，...
...了的东西，比如tomcat里的servlet就是线程，没有线程我们如何提供多用户访问呢？不过很多刚开始接触线程的开发攻城师却在这个上面吃了不少苦头。怎么做一套简便的线程开发模式框架让大家从单线程开发快速转入多线程开发...