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Vertica Blog

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List the Missing Dates in a Date Series

The TIMESERIES clause in Vertica makes it easy to list all of the gap days (that is, those that are missing) from a series of dates. Say I have this simple date series: As you can see, there are several dates missing from the series (2020-10-30, 2020-11-02, 2020-11-03 and 2020-11-04). I can list these absent...
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Getting Every Nth Row from a Table (Enhanced)

In a previous Vertica Quick Tip we learned how to query every Nth row from a table when we had a unique ID column having sequential values (that is, from a sequence). See, What if we don’t have a key like that in our table? No problem thanks to the ROW_NUMBER() Analytic Function! Say I...
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Vertica Version 10 Launches Today!

There’s , on the first day of the – a major new version of Vertica blasts off! Vertica version 10 soars straight into the greatest deployment flexibility of any analytical data warehouse on the market. This fast and extremely scalable platform gives you more power than ever to get industry-changing analytics, including even more advanced...
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Write Optimized Store (WOS) Deprecation – What You Need to Know

In Vertica 10.0, WOS (Write Optimized Store) will be deprecated. In this blog, we introduce the historical justification for WOS and its purpose, why we believe that it's no longer needed, and our justification for deprecating it. We'll go over the data and the testing we performed that gives us the confidence to ensure that...
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New hands-on training at Vertica Academy takes users deep into Vertica Essentials

Since was launched in September 2019, this versatile online training portal has acquired more than 1,500 registered users (as of beginning of March), and that number is growing daily. Users are finding answers to tough questions that arise as they explore the complex world of big data analytics. They’re finding self-paced courses, webinars and certifications,...
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Define a Vertica Flattened Table Column as Having Both DEFAULT and SET USING Constraints

Columns in a flattened table can query other tables with constraints DEFAULT and SET USING . Vertica executes DEFAULT queries only on new rows when they are added to the flattened table, through load operations such as INSERT and COPY. Thereafter, changes in the original data sources have no effect on the flattened table. Vertica...
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Which Database Mode Is My Database Using?

You can run Vertica in either Eon Mode or Enterprise Mode. The primary difference between Eon and Enterprise Modes is where they store data. Eon Mode stores data in a shared object store called communal storage, while Enterprise Mode stores data across the filesystems of the database nodes. If you are working with a new...
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Moving a Table to a New Schema and Inheriting the New Schema Privileges

You can move a table from one schema to another schema with a simple ALTER TABLE command. But, you might be surprised that the table will not inherit the new schema’s privileges even if the new schema was created using the DEFAULT INCLUDE PRIVILEGES directive. After moving the table you will need to manually alter...

Announcing Vertica 9.3 Instructor-Led Training Courses

Just in time for the release of version 9.3, Vertica is pleased to announce the release of two updated instructor-led training courses: Vertica 9.3 Essentials and Vertica 9.3 Descriptive Analytics. A description of each course follows: Vertica 9.3 Essentials This 4-day course explores the capabilities of the Vertica platform solution in Enterprise mode, and prepares...
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Vertica and Amazon – Better Together, for Years

The year was 2012. Marvel’s The Avengers hit the box office. Facebook went public. NASA's Curiosity rover landed on the surface of Mars. And, the Vertica AMI (Amazon Machine Image) made its debut on , enabling data-driven organizations to easily deploy Vertica on the Amazon cloud and start accelerating their analytics. Running Vertica on Amazon...
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Tracking Raw Schema Size Over Time

There is no way to go back in time to see how large a schema was a day/month/year ago. But you can use the AUDIT function to get a “raw” size of a schema and track growth over time by storing the results from a daily audit. Using cron, you can run this daily. Helpful...
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The Vertica Academy Is Open for Learning

One of the greatest impacts from digital transformation, both from a personal and professional point of view, is not just the democratization of data - a very popular topic here at Vertica! - but the democratization of knowledge. Today, we are excited to announce the new, a platform that offers self-paced, technical training and certifications...