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.
ETL
Accelerating ETL with Snowflake: A Comparison of Load Times with Teradata
Teradata Load Times vs. Snowflake Load Times Elasticity is a crucial aspect of contemporary cloud databases like Snowflake that sets them apart from on-premise shared-nothing databases like Teradata. The lower cost (“pay only what you need”) is one of the main advantages. I think this is a very one-sided approach. Databases like Snowflake must first …
Teradata Transactions: Main Characteristics and Best Practices
What Are The Main Characteristics Of Transactions in Teradata? The Teradata Mode For Transactions Various techniques exist for composing SQL statements and applying transaction handling. Each approach has unique benefits, drawbacks, and characteristics worth considering. Let’s examine two sequential statements as an illustration: Using Teradata Mode With Explicit Transaction These statements can be executed as …
Shrinking Teradata Tables: Reduce Table Size by 90% with This Simple Trick
Despite implementing Multivalue Compression to minimize the size of our tables, we still require additional space. Shrinking A Teradata Table To A Minimum Size I once used a trick that reduced an already optimized table with multivalue compression to just 10% of its original size. This is a pattern worth watching for in your own …
Building a Teradata Data Warehouse: Considerations for ETL Process, SQL Queries, and Physical Data Model
This post aims to compile all crucial aspects to be considered while constructing a Teradata Data Warehouse, including the ETL process and SQL queries. This list is just the beginning, and I anticipate receiving valuable feedback from my readers to expand it in the future. Initially, I have provided a few concepts, but I intend …
Teradata Referential Integrity: What it is and Why You Need it for Data Consistency and Performance
Introduction to Teradata Referential Integrity Teradata implements 3 Types of Referential Integrity. 1. What is Standard Referential Integrity? The Standard Referential Integrity checks every Row INSERT, DELETE, or UPDATE immediately to ensure referential integrity. A reference index sub-table is required for referential integrity. Violation of referential integrity results in the failure of execution and generates …
7 Deadly Sins That Destroy A Teradata Data Warehouse
To exemplify the impact of mistakes in Teradata Data Warehouse projects, consider the analogy of a medical team. Imagine yourself as the project, preparing for a crucial and costly procedure. Naturally, you wouldn’t want to hear the staff engage in the following conversations before administering the anesthesia. 1. Not knowing or losing Sight of the …
Teradata Table Design Checklist: Primary Index, Character Set, and Data Type Considerations
Teradata Table Design Checklist As creating tables is a frequent task, I deemed it necessary to provide a checklist. 1. Primary Index Or NOPI Table? The Primary Index serves multiple purposes, primarily functioning as the primary access path to the data and being optimized for an even distribution of rows. However, designing a table without …
Achieve Incredible Teradata Join Performance
Executive summaryGUEST POST BY ARTEMIY KOZYR Today I shed some light on how Data Warehousing lies at the core of Retail Banking operations. We will see the actual case of vital marketing process malfunction and dive deep under the surface level to comprehend data alchemy technical issues. You will learn how to approach such issues, …
Why Teradata DBAs Should Prioritize Housekeeping the DBC AccessRights Table
As any experienced Teradata DBA will tell you, some tables in the Teradata dictionary (DBC) need housekeeping. But some customer sites that I have worked with ignore table DBC.AccessRights. If you have ever analyzed this table on a Teradata system, you will almost certainly spot two things quickly. Since this is a system table, altering …