database-performance

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How to improve Performance with Oracle SQL Join

The situation is I have to join more than 10 differ开发者_C百科ent table. In the SQL I am joining the same table 5 times. The query looks like this.[详细]

2023-04-12 18:57 分类：问答
Low priority request in PHP or MySQL

I Have a site and a database with 5 million rows, it\'s working like a charm. However, I\'m running a cleanup 开发者_JAVA技巧cronjob each hour, to put the old data to a \'log\' table and delete the ol[详细]

2023-04-12 08:32 分类：问答
Optimal Strategy to Resolve Performance in Search Operations - SQL Server 2008

I\'m working on a mobile website which is growing in popularity and this is leading to growth in some key database tables - and we\'re starting to see some performance issues when accessing those tabl[详细]

2023-04-12 04:00 分类：问答
sql INNER JOIN table variable ON VS. INNER JOIN (select) ON

I\'m wondering if using a table variable开发者_如何学JAVA is more or less performant than using an inner join (select)[详细]

2023-04-11 23:30 分类：问答
Why are bitmap index operations high CPU bound?

Why are bitmap index operations have a tradeoff being high CPU bound开发者_如何学编程?[详细]

2023-04-08 22:27 分类：问答
About Youtube views count

I\'m implementing an app that keeps track of how many times a post is viewed. But I\'d like to keep a \'smart\' way of keeping track. This means, I don\'t want to increase the view counter just becaus[详细]

2023-04-08 21:31 分类：问答
How to INSERT tags in three-table system

Although some major systems like Joomla store tags as comma-separated text in the main article database, normalized system of three tables as article, tags and tag-relationship is preferred (as others[详细]

2023-04-05 23:57 分类：问答
SQL table design advice

I am building a community site where logon will be by email and members will be able to change their name/nick name.[详细]

2023-04-04 01:26 分类：问答
SQL converting rows data in to column using single table

I am trying to convert one of DB table row in to column and using PIVOT function with cursors, here is the Sql:[详细]

2023-03-28 04:26 分类：问答
Complexity in choosing one method over another for fetching data from Mysql

I am working on a project based on PHP, Mysql , Apache. I have a module called notification which is just like Notification available in FACEBOOK, for this I have 3 ways[详细]

2023-03-27 14:01 分类：问答