Explain the data loading types.

Data loading process in ETL loads the prepared data from staging tables to main tables.

ETL has three types of data loading:

• Initial Load: It populates data tables from the source table and loads them in the data warehouse table.
• Full Refresh: It erases the data from one or more tables completely and reloads the fresh data.
• Incremental Load: It applies the ongoing changes as required periodically.