大约有 42,000 项符合查询结果(耗时:0.0339秒) [XML]

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PDOException “could not find driver”

I have just installed Debian Lenny with Apache, MySQL, and PHP and I am receiving a PDOException could not find driver . 3...
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MySQL Server has gone away when importing large sql file

... As stated here: Two most common reasons (and fixes) for the MySQL server has gone away (error 2006) are: Server timed out and closed the connection. How to fix: check that wait_timeout variable in your mysqld’s my.cnf configuration file is large enough. On Debian: su...
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What is the difference between MySQL, MySQLi and PDO? [closed]

What is the difference between MySQL, MySQLi and PDO ? 4 Answers 4 ...
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What is InnoDB and MyISAM in MySQL?

What is InnoDB and MyISAM in MySQL ? 8 Answers 8 ...
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PHP code to convert a MySQL query to CSV [closed]

What is the most efficient way to convert a MySQL query to CSV in PHP please? 6 Answers ...
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Why does C++ require a user-provided default constructor to default-construct a const object?

...type X (or array thereof), X is const-default-constructible, if T is a union with at least one non-static data member, exactly one variant member has a default member initializer, if T is not a union, for each anonymous union member with at least one non-static data member (if any), exactly on...
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新浪是如何分析处理32亿条实时日志的? - 更多技术 - 清泛网 - 专注C/C++及内核技术

新浪是如何分析处理32亿条实时日志的?【编者的话】我从2014年初入职新浪后就开始接触实时日志分析相关的技术,主要是ELK(Elasticsearch、Logstash、Kibana),当时是学习+ELK优...【编者的话】我从2014年初入职新浪后就开始接触实...
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Export Data from mysql Workbench 6.0

I'm trying to export my database, using MySQL Workbench 6.0 on Windows, to send to my db instance in Amazon RDS, but i'm getting this error: ...
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Select first row in each GROUP BY group?

...mon problem can surprisingly be found in the one of most official sources, MySQL manual! See Examples of Common Queries :: The Rows Holding the Group-wise Maximum of a Certain Column.
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Difference between CTE and SubQuery?

... most useful for recursion: WITH hier(cnt) AS ( SELECT 1 UNION ALL SELECT cnt + 1 FROM hier WHERE cnt < @n ) SELECT cnt FROM hier will return @n rows (up to 101). Useful for calendars, dummy rowsets etc. They are also more readable (i...