data warehousing and olap

About Program Batch Warehousing solution Younger brother about a recent batch warehousing solutions to share with you, because it is the first blog, what is wrong, please advise Recent projects have used a large concurrent write database operation, when using only a single piece of data to commit once, so that the insertion will be very slow, the database

matrix provides a roadmap to the families of fact tables in your Data warehouse. While many of us is naturally predisposed to dense details, we suggest your begin with the more simplistic, high-level mat Rix and then drill-down to the details as each business process is implemented. Finally, for those of a existing data warehouse, the detailed matrix was often a useful tool to document the "as Is ' status

PHP-based simple acquisition of data warehousing program "sequel", PHP Collection and storage sequel In the previous article, we have collected the list data of the news information page, and the next thing to do is to read the URL from the database and fetch the page. Create a new content table However, it is important to note that the acquisition URL can no lo

(Title,url) value ('$value‘, ‘$url‘)"; mysql_query($sql); //echo " } $id++; Echo"Collecting URL Data list$id... Please, later ... "; Echo" '; }Else{ Echo"End of data acquisition. "; }?>conn.php is a database connection filelist.php is this pageBecause the data to be collected is paginated, and the page address is a regular increment, so I used the JS

Without the tools of hash joins and parallel, MYSQL is destined not to be a suitable data warehousing tool.Whether it is MyISAM or InnoDB, when dealing with a complex SQL query, it is not possible to perform multi-core CPU performance.Only one CPU is running at full load.So for an analytic database, MySQL multicore is actually a huge waste.But after the selection of the scheme, can only do more optimization

I first learned about Data Warehousing-"getting your head off." Here I will talk about some of my new understandings and opinions, I hope this will be a simple introduction to those new beginners, and I hope it will be helpful. Speaking of the data warehouse, let's take a look at its background. Since the rise of dbase iii (dBase was a database management program

to the storage method * MD5 encrypt the user's password before invoking the method of the parent class to write to the database */ Public function Create ($data) { $data = Array_map ("Addslashes", $data); To safely escape punctuation marks (single, double quotes) in data $

The rules for executable validation areNotempty cannot be emptyNumber can only be an integerIsemail Mailbox address is correctWhether the Hasone is unique (duplicates, whether it already exists)Regex Custom Regular expression The format of the validation isArray (validation method, field name for validation, prompt for validation error)For validation of regular expressionsArray ("Regex", "mobile", '/^13d{9}$/', "User name cannot be left blank")Execute fragment to write

In the previous article based on the PHP Data Warehousing Program (ii) mentions the collection of news information page list data, next talk about the collection of news specific contentThis is the final data sheet for the previous blog:The next thing to do is to read the required URL from the database and fetch the pa

Business requirements The app client sends the JSON data to the server interface once a day, emptying the cache and sending it again. Business logic before a problem: The PHP interface first converts JSON to an array to insert nonexistent data in a large table The user already exists and the new ID into a different table of particulars The problem lies in: When the user clears the cache due to special ci

Tags: Orderparam Auxiliary class If there is a similar please understand!DbContext General Data Warehousing class