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The original: "Bi thing-the art of data" understanding Dimension Data Warehouse-fact table, dimension table, aggregation tableFact tableIn a multidimensional data warehouse, a table that holds a detailed value or fact for a measure is called a fact table. A fact table that s

Fact tableIn a multidimensional data warehouse, a table that holds a detailed value or fact for a measure is called a fact table. A fact table that stores sales and sales by state, product, and month has 5 columns that are conceptually similar to the following example. Sate Product Mouth Units Dollars WA Mounta

Solemn declaration: original reproduced in http://dengqi.blog.51cto.com/5685776/1223132Salute to Good articles!!!A: MAC Address Table detailedWhen it comes to the MAC address table, you have to say how the switch works because the switch forwards the data frame based on the MAC address table. There is a table in the sw

partition table in SQL Server 2005 (iii): Converting a normal table to a component area tableCategory: SQL Server2009-12-03 17:01 9709 People read Comments (6) favorite reports SQL Serverinserttablenullsql DatabaseIn the design of the database, often do not take into account the problem of table partitioning, often in the burden of the data

This article from the following aspects to collate the concept and operation of the partition table:1. Table space and the concept of partitioned tables2. The specific role of table partitioning3. Advantages and disadvantages of table partitioning4. Table partitioning of sev

In the data warehouse field, there is a concept called transaction fact table, which is generally translated as "transaction fact table" in Chinese ". Transaction fact tables are one of the three basic types of fact tables in the data warehouse for dimensional modeling. The other two types are periodic snapshot fact tables and cumulative snapshot fact tables. Transaction fact tables use the same consistenc

Transferred from: http://www.aboutyun.com/forum.php?mod=viewthreadtid=8590highlight=hive Questions Guide:1. How to view the hive table structure.2. How to view table structure information.3. How to view the partition information.4. Which command can blur the search table 1.hive Fuzzy Search Table Show tables like ' *n

Tags: dev term int unlock page casing InnoDB case constraintOne, simple description:1), the limit of the transmission table space:1,mysql version 5.6.6 and above, and version recommendation source and target versions are recommended for GA version and large version2, the table engine is InnoDB and opens a stand-alone tablespace innodb_file_per_table3, the table i

In the design of the database, often do not take into account the problem of table partitioning, often in the burden of the data table load is getting heavier, will take into account the partitioning method, at this time, it is related to how to convert the ordinary table to the problem of the Component table.So, how do you convert a normal

This article from the following aspects to collate the concept and operation of the partition table:1. Table space and the concept of partitioned tables2. The specific role of table partitioning3. Advantages and disadvantages of table partitioning4. Table partitioning of sev

Full table Scan (Scans, FTS)Full-table scanning means that when Oracle accesses the data in the target table, it starts scanning from the first block (block) of the first area occupied by the table, scanning to the table's high watermark (Hwm,high water Mark), EXTENT Oracle imposes the filter criteria specified in the

1.hive Fuzzy Search Table Show tables like ' *name* ';2. View table structure InformationDESC formatted table_name;DESC table_name;3. View partition informationShow partitions table_name;4. Querying data based on partitionsSelect Table_coulm from table_name where partition_name = ' 2017-02-25 ';5. View HDFs File informationDFS-LS/USER/HIVE/WAREHOUSE/TABLE02;6. Load data into

If the data in one of the tables in your database meets the following criteria, you should consider creating a partitioned table.1. There is a lot of data in a table in the database. What are many concepts? 10,000 lines? 20,000 lines? Or 100,000 or 1 million? This, I think is the question of the benevolent see and the beholder. Of course, when the data in the data table