Roland Wenzlofsky
Detecting Overlapping Time Periods with Teradata OVERLAPS Command: A Simple Syntax Guide
Learn how to use the Teradata OVERLAPS command to detect overlapping time periods with this example query. Caution: minimum overlap required.
Optimizing Teradata Statements Containing Multiple JOINS
1. Outline
This showcase demonstrates optimizing statements with multiple JOINs using Teradata Optimizer's tuning approach. The approach efficiently determines the best JOIN strategy and implements data redistribution instead of duplication when necessary.
Identify and break down underperforming segments to optimize complex logic with multiple joins. Employ an execution
Optimizing Queries with LIKE Operator in Teradata
Learn how to optimize LIKE operator queries in Teradata to avoid full table scans and improve performance. Read on for expert tips and tricks.
Teradata Columnar Compression Methods: Run-Length, Dictionary, and Delta Compression
Learn about the benefits of compression in Teradata Columnar, including a reduction in permanent space and disk IOs. Different compression methods are used, including run-length, dictionary, and delta compression. This article explains how each method works and the advantages of using them.
Designing Small Reference Tables for Teradata: Storing All Rows on One AMP for More Efficient Queries
When designing tables for Teradata, it is important to distribute the rows across all AMPs in the system evenly. For instance, on a 100-AMP system with 100,000 rows, the objective would be to allocate roughly 1,000 rows per AMP.
I agree with the design guideline for many tables
Optimizing Teradata Stage Table Design for Faster Load Times: The Importance of Data Types and Sizes
Learn how to optimize load times in Teradata by choosing the correct data types and sizes for stage tables. Read on for a real-life example.
Teradata Statistics Design for High Performance: An Introduction
Learn how Teradata 14.10 simplifies statistics collection for better performance. Discover new features that identify unused and missing statistics.
Teradata Statistics Collection for Improved Query Performance
Learn how to optimize your Teradata queries with statistics collection. Discover what to collect and what to omit for accurate query estimation.