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data mart → finance. In a dependent data mart, the data can be derived from an enterprise-wide data warehouse. In … an independent data mart, data can be collected directly from sources. … A data warehouse that is designed for a particular line of business, such
Transportable Tablespaces Example Suppose that you have a data warehouse containing sales data, and… → example, the tablespace ts_temp_sales could contain multiple tables. For example, perhaps the data mart … The current month's data must be placed into a separate tablespace in order to be transported. In … this example, you have a tablespace ts_temp_sales, which holds a copy of the current month's data … . Using
Step 3 Copy the Datafiles and Export File to the Target System → data mart platform, using any transportation mechanism for flat files. Once the datafiles have been … Copy the data files that make up ts_temp_sales, as well as the export file jan_sales.dmp to the
Step 4 Import the Metadata → Once the files have been copied to the data mart, the metadata should be imported into the data … mart. You can incorporate this new data into the data mart's tables. You can insert the data from … a permanent part of the data mart.
Data Abstraction → Data abstraction lets you work with the essential properties of data without being too involved … with details. You can design a data structure first, and then design algorithms that manipulate it … . Topics Cursors Composite Variables %ROWTYPE Attribute %TYPE Attribute Abstract Data Types Cursors A … always of
Loading Data into Data Warehouses → A popular and efficient way to load data into a data warehouse or data mart is to use SQL*Loader … with the DIRECT or PARALLEL option, Data Pump, or to use another loader tool that uses the Oracle … -phase. In one-phase loading, data is loaded directly into the target table, quality
Overview of Transportation in Data Warehouses → data warehouse to a data mart Transportation is often one of the simpler portions of the ETL process … Transportation is the operation of moving data from one system to another system. In a data … warehouse environment, the most common requirements for transportation are in moving data
2 Creating Relational Data Objects → After you finish designing your data warehouse or data mart, you are ready to design your target … system. This chapter shows you how to create relational data objects.
Data Type Compatibility → You can assign a collection to a collection variable only if they have the same data type. Having … element type, VARCHAR(15). Collection variables group1 and group2 have the same data type, triplet, but … collection variable group3 has the data type trio. The assignment of group1 to group2 succeeds, but … the assignment of group1
SQL Data Types → The PL/SQL data types include the SQL data types. For information about the SQL data types, see … Oracle Database SQL Language Reference —all information there about data types and subtypes, data type … comparison rules, data conversion, literals, and format models applies to both SQL
BOOLEAN Data Type → The PL/SQL data type BOOLEAN stores logical values, which are the Boolean values TRUE and FALSE and … expression. For details, see \"BOOLEAN Expressions\". Because SQL has no data type equivalent to BOOLEAN
Configure I/O for Bandwidth not Capacity → , consider a 200GB data mart. Using 72GB drives, this data mart could be built with as few as six drives … Storage configurations for a data warehouse should be chosen based on the I/O bandwidth that they … data, but cannot provide the same I/O throughput as a larger number of small
Contents → Conventions What's New in Oracle Database? Oracle Database 11g Release 2 (11.2) New Features in Data … Warehousing Oracle Database 11g Release 1 (11.1) New Features in Data Warehousing Part I Concepts 1 … Data Warehousing Concepts What is a Data Warehouse? Subject Oriented Integrated Nonvolatile Time … Variant
Overview of Materialized View Management Tasks → longer useful. After the initial effort of creating and populating the data warehouse or data mart, the … materialized views should be dropped. Archiving old detail and materialized view data that is no … incremental changes from the operational systems. Transforming the data. Verifying that the incremental
Rolling Materialized Views → data mart contains a time dimension, it is often desirable to archive the oldest information and … and then repopulate the partition with new data. Oracle Database uses this variant of fast refresh … or list partitioned. PCT refresh is nonatomic. Rolling Materialized Views When a data warehouse or … maintenance
Transportation Using Transportable Tablespaces → a staging database to a data warehouse, or in moving data from a data warehouse to a data mart. … Oracle transportable tablespaces are the fastest way for moving large volumes of data between two … Oracle databases. Previous to the introduction of transportable tablespaces, the most
Extraction Through Distributed Operations → table in a data mart, country_city, and populates it with data from the countries and customers tables … Extracting into Flat Files Using SQL*Plus The most basic technique for extracting data is to … customized format. Note that, using the external table data pump unload facility, you can also extract
Fetching Data with Cursor Variables → statement, which works as described in \"Fetching Data with Explicit Cursors\". The return type of the … a variable whose value is a query. Example 6-26 Fetching Data with Cursor Variables DECLARE cv
PLS_INTEGER and BINARY_INTEGER Data Types → The PL/SQL data types PLS_INTEGER and BINARY_INTEGER are identical. For simplicity, this document … uses PLS_INTEGER to mean both PLS_INTEGER and BINARY_INTEGER. The PLS_INTEGER data type stores signed … data type has these advantages over the NUMBER data type and NUMBER subtypes: PLS_INTEGER values
3 PL/SQL Data Types → Every PL/SQL constant, variable, parameter, and function return value has a data type that … determines its storage format and its valid values and operations. This chapter explains scalar data types … , which store values with no internal components. For information about composite data types, see … Chapter 5, \"PL/SQL Collections