what is fact and dimension table in data warehousing

table can divide information into hierarchical levels of structure.Conclusion:1, the fact table is what you want to pay attention to;2. The dimension table

In the past, the dimension tables, fact tables, data analysis, BI and other concepts have some ambiguity. These days of study finally let these have some clues:A dimension represents the amount of data you want to analyze , such as when you analyze a product's sales, you ca

product information usually contains a hierarchy of products into several categories, such as food, beverage, and non-consumer products. each category of these products is further subdivided multiple times, until each product reaches the lowest level. In a dimension table, each table contains

physical model of the Data Warehouse.2. Basic concepts of fact tables and dimension tablesSimply speaking, the dimension table is the angle (dimension) in which you observe the object,

In See most Dialog reporting tables also use a suffix to identify the table as a fact (_fact) table or a dimension table (_dim ) When you want to know the difference between the two tables, just search for it. The Fact

Use the java date class to generate a data warehouse dimension table Use the java date class to generate a data warehouse dimension table Date class: Returns the number of milliseconds of a relative date. Accurate to milliseconds,

Generating a Data Warehouse dimension table using the Java date classDate class:The most basic date-time class that returns the number of milliseconds for a relative date. Accurate to milliseconds, but does not support the internationalization and sub-timezone display of dates. The date class began to evolve from the Java Development Package (JDK) 1.0, when it co

Using the Javadate class Data Warehouse dimension tableDate Category:, returns the number of milliseconds for a relative date. Accurate to milliseconds. However, the internationalization and sub-timezone display of dates is not supported.The date class began to evolve from the Java Development Package (JDK) 1.0, when it included only a few ways to get or set the

For example, a complete job search information can include (basic personal information table, personal education information table, Personal Certificate Table, personal job search information table, and Personal Job Search renewal table .... I want to obtain a complete perso

Query the size of all tables in the database, and which tables have a large amount of dataCreate Table#t (Namevarchar(255), Rowsbigint, reservedvarchar( -), datavarchar( -), index_sizevarchar( -), unusedvarchar( -)) execSp_msforeachtable "Insert into#texecsp_spaceused'?'" Select SUBSTRING(T.reserved,0,CHARINDEX('KB', t.reserved)-1),* from#t TOrder by cast(SUBSTRING(T.reserved,0,CHARINDEX('KB', t.reserved)-1) as int)descDrop

When I use mysqldump to export a portion of the table data, what is the case? When I use mysqldump to export a portion of the table data, what is