database-optimization

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Optimize query that compares two tables with similar schema in different databases

I have two different tables with similar schema in different database. What is the best way to compare records between these two tables. I need to find out-[详细]

2023-02-20 10:09 分类：问答
Which of the following SQL queries would be faster? A join on two tables or successive queries?

I have two tables here: ITEMS ID| DETAILS| .....| OWNER USERS: ID| NAME|.... Where ITEMS.OWNER = USERS.ID I\'m listing the items out with their respective owners names. For this I could use a joi[详细]

2023-02-06 12:51 分类：问答
Does GAE Datastore support eager fetching?

Let\'s say I want to display a list of books and their authors.In traditional database design, I would issue a single query to retrieve rows from the Book table as well as the related Author table, a[详细]

2023-01-24 18:04 分类：问答
How do we greatly optimize our MySQL database (or replace it) when using joins?

This is the first time I\'m approaching an extremely high-volume situation. This is an ad server based on MySQL. However, the query that is used incorporates a lot of JOINs and is generally just slow.[详细]

2023-01-03 16:01 分类：问答
I can store a lot of data (<=4GB) in one table column. But is it a good idea?

To make a long story short, one part of the application I\'m working on needs to store a somewhat large volume of data in a database, for another part of the application to pick up later on. Normally[详细]

2022-12-16 16:48 分类：问答
How can we optimize this linq to entity query to decrease the response time?

IQueryable<WebEvent> mySearch = eventDC.GetBooks() .W开发者_JAVA百科here(p => p.Price.Any(d => d.EventDatetime.Month == fromDate.Month[详细]

2022-12-16 06:55 分类：问答
Database for microblogging startup

I will do microblogging web service (for school, so don\'t blast me for lack of new idea) and I worry that DB could be often be overloaded (user could following other users or even tag so I suppouse开[详细]

2022-12-09 18:57 分类：问答