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Are staging tables used only in Data warehouse project or in any SSIS Project? I would like to know what is a staging table? Can anyone give me some examples on how to use it and in what circumstances it is implemented? Also, may I please know the best practices while using it?
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The staging table is a temporary table that holds all of the data that will be used to make changes to the target table, including both updates and inserts. A merge operation requires a join between the staging table and the target table.
Staging tables provide a buffer between the warehouse and the data sources. There is one staging table for each source table or file. Staging tables duplicate source schema and add system attributes. Staging tables hold a history of data from their operational counterparts.
A staging area, or landing zone, is an intermediate storage area used for data processing during the extract, transform and load (ETL) process. The data staging area sits between the data source(s) and the data target(s), which are often data warehouses, data marts, or other data repositories.
When data is imported into Profitability and Cost Management, users create the staging tables that provide the pre-defined structure to manage the import. The tables are created using a relational database, such as Oracle or SQL Server, to organize the data into a format that can be easily matched to the application.
staging tables are just database tables containing your business data in some form or other. Staging is the process of preparing your business data, usually taken from some business application. For your average BI system you have to prepare the data before loading it. A staging table is essentially just a temporary table containing the business data, modified and/or cleaned. Depending on your actual case you may have several staging tables from different source systems that then are combined into the resulting fact table for the BI system.
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