Loading data using partition exchange

Table partitioning is a commonly used strategy in data warehouse systems, and although the many reasons for partitioning a table are beyond the scope of this book, suffice it to say that performance and high availability are among the primary reasons for doing so. From a data loading perspective, the gold standard ELT strategy for targeting a partitioned table is universally considered to be the partition exchange loading (PEL) method. This advanced technique involves five basic steps:

1. Create a standalone database table that is structurally identical to the partitioned table.

2. Load all source records into the standalone table that comply with the boundary definition of a specific partition within the partitioned table.

3. Create all secondary objects (local indexes, constraints) for the standalone table such that the final structure is identical to that of the partitioned table.

4. Exchange the contents of the standalone table with that of its corresponding partition...