Teradata: Improving Analysis and Storage
About this course
This is the second course in our Specialization in Teradata and Data Analysis. In the first course, we set up the concepts, principles, and practical basics to install software, load data, and design a logical and physical data model. In this second course, we'll improve our techniques for data analysis, with an eye on efficiency and storage for your real-world applications on the job. In Module 1, we’ll grow your SQL Toolkit with multi-table, aggregate functions like SUM, AVG, MAX and COUNT. We’ll also expand your concept of primary and foreign keys, so you can make your first JOIN commands in SQL and define relationships between tables. Our second module is focused on SQL subqueries. We’ll start with single-row subqueries, comparing them to JOIN commands. Then we’ll examine multiple-row subqueries, which allow you to compare a value against multiple values returned from a subquery. In Module 3, we’ll examine SQL Techniques. We’ll recognize use cases and strategies to use windowed functions in SQL. We’ll define the structure of hierarchical queries in SQL. And we’ll identify for using indexes, so we can optimize our tables for data retrieval.
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What you'll learn
- advanced SQL techniques
- multi-table queries
- data aggregation with SUM, AVG, MAX, and COUNT
- understanding primary and foreign keys
- subqueries and JOIN commands
- windowed functions usage
- optimizing data retrieval with indexes
Course objectives
- improve efficiency in data analysis
- expand SQL toolkit
- define relationships between tables effectively
- learn to optimize tables for data retrieval
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