Oracle updating through view

Extraction, transformation and loading (ETL) is done on a scheduled basis to reflect changes made to the original source system.During this step, you physically insert the new, updated data into the production data warehouse schema, and take all the other steps necessary (such as building indexes, validating constraints, making backup copies) to make this new data available to the users.The view object defines the attributes of the view row class, which represents a row in the query result, and optionally refers to underlying entity objects.

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A view object is a class that lets you define and work with a set of rows, often in service of a user interface.

Typically, a view object contains a SQL query that selects data from a database.

In the data warehouse example, suppose the new data is loaded into the sales table every month.

Furthermore, the tables, restricting the query by date.

You create views based on what the client needs to display The views of data can be based on but are independent of the underlying entity objects, enabling flexible data retrieval to support the required UI.

In other words, you can query a set of data exactly as you want to show it in the display.

Take advantage of a materialized view that will speed up the majority of the queries against the three tables.

Use a pre-built table on top of which the materialized view will be created.

So let’s do that step by step In cs file import the SQL namespaces on top .student ID, student Name, student Address and in a single data table we can store data for specific topic.

Like to store student's records you can have students data table, For school accounts you can have accounts data table, For school results you can have results data table.

The loading process is often considered when choosing the partitioning scheme of data warehouse tables.

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