15.00 - Types of Join Index - Teradata Database

Teradata Database Design

prodname
Teradata Database
vrm_release
15.00
category
User Guide
featnum
B035-1094-015K

Types of Join Index

There are four basic join index types defined over two orthogonal dimensions: single or multitable and simple or aggregate. These are better thought of as ways to group functionality than as different types of join index.

  • Single-table simple
  • You can also create a column‑partitioned version of a single‑table simple join index.

  • Single-table aggregate
  • Multitable simple
  • Multitable aggregate
  • All join index types can also be sparse, meaning that only the set of rows that satisfy a WHERE clause restriction in the index definition are included in the index (see “Sparse Join Indexes” on page 556).

    See Chapter 11: “Join and Hash Indexes” and SQL Data Definition Language for further information.