Data Loading

Types data elements and entities (Tables) for ETL.

It is important for an ETL developer to understand the types of tables and data, to intelligently design ETL processes. Once the common types objects are understood, reusable templates for ETL can be developed, regardless of business logic. This will greatly improve the efficiency of an ETL developer. 1. Reference data 2. Dimensional data (master […]

Simulating Oracle Sequences in Sybase & SQL Server

Programmatic control is lost when identity columns are used in Sybase and SQL Server. I do not recommend using Identity columns to create surrogate keys during ETL process. There are many more reasons for that. Oracle has the sequence feature which is used extensively by Oracle programmers. I have no clue why other vendors are […]