Vertica Blog

Vertica Blog

query

Helpful Tips in blue text with magnifying glass

Quick Tip: Determining Database “Cell” Count

Jim Knicely, Vertica Field Chief Technologist
July 14, 2021

The Vertica system tables LICENSE_AUDITS and USER_AUDITS include a mysterious column called CELL_COUNT. What exactly is the Cell Count? It's simply a calculation that looks like this: DATABASE CELL_COUNT = (Table_1 Column Count * Table_1 Row Count) + (Table_2 Column Count * Table_2 Row Count) + … + (Table_n Column Count * Table_n Row Count)...
NLP augmented analytics is like Ask Me Anything with your data

Natural Language Processing Augmented Analytics

Paige Roberts, Vertica Open Source Relations Manager
February 3, 2021

By simplifying the asking of questions and understanding of answers, NLP augmented analytics broadens the number of people who can use analytic technology

List the Missing Dates in a Date Series

Jim Knicely, Vertica Field Chief Technologist
October 22, 2020

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...
Compass rose with true north pointing to "Helpful Tips" text

Getting Every Nth Row from a Table (Enhanced)

Jim Knicely, Vertica Field Chief Technologist
October 20, 2020

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, https://www.vertica.com/blog/vertica-quick-tip-getting-every-n-th-row-table/ What if we don’t have a key like that in our table? No problem thanks to the ROW_NUMBER() Analytic Function! Say...

Extracting Log Data into Vertica With Regex Parsing

Bryan Herger, Vertica Big Data Solution Architect at Micro Focus
October 5, 2020

Formatted text such as system logs hold a huge amount of actionable data if you can extract and discover the content. If there is a pattern to the lines, then you can build a Vertica regex parser to extract fields and contents into Vertica for query and analysis at scale. Vertica’s regex parser uses Perl-like...
Larry Bird Monument - Photo by Eric Kilby WC

Practice Makes Perfect at BDC 2020

Jeff Healey, Sr Director, Vertica Product Marketing at Micro Focus
February 19, 2020

Larry Bird, Boston Celtics legend and NBA Hall of Famer, shot 500 free throws every morning before his first class in high school. But, he didn’t stop there. Larry was known to shoot 100 free throws after every NBA game. The result? The sharp-shooting forward from French Lick, Indiana led the NBA in free throw...
Cubes with binary ones and zeroes on them clustered together floating in blue space with light shining out

2 – What Are the Benefits of Using Complex Data Types in SQL?

Waqas Dhillon, Product Manager - Machine Learning, Vertica
December 19, 2019

Co-authored by James Clampffer, Deepak Majeti. In this second post in the Complex Data Types blog series, let’s look at some of the reasons complex types are used extensively in organized big data formats like ORC and Parquet. Be sure to read the first post in this series where we discussed the what complex data...
Construction site crane building a blue SQL 3D text.

Get the Row Count from an Outer Table Join

Jim Knicely, Vertica Field Chief Technologist
October 22, 2019

Aggregate functions summarize data over groups of rows from a query result set. When using an aggregate function like COUNT with an "*" or "1" parameter value, you may get a different result when the query implements a LEFT join verses an INNER join. If you want a row count of just the rows from...
Create Read Update Delete in red 3D letters surrounded by 3D ones and zeroes

Vertica 9.3 Supports UPDATE and DELETE Operations on Tables Having Live Aggregate Projections!

Jim Knicely, Vertica Field Chief Technologist
October 17, 2019

A live aggregate projection contains columns with values that are aggregated from columns in its anchor table. When you load data into the table, Vertica aggregates the data before loading it into the live aggregate projection. On subsequent loads (for example, through INSERT or COPY) Vertica recalculates aggregations with the new data and updates the...
Focused young woman working at laptop in office

The Vertica Academy Is Open for Learning

Joy King, VP Product & GTM Strategy, Vertica
September 9, 2019

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 Vertica Academy, a platform that offers self-paced, technical training...
Passenger balloon floating in blue sky

Announcing Vertica Version 9.2.1 – Take Analytics Efficiency to the Next Level

Paige Roberts, Vertica Open Source Relations Manager
May 10, 2019

This week, some very cool things have gone into the newest version of the Vertica Analytics Platform that make your analytics fly and save on your AWS budget. The theme for this release is Improving Vertica in Eon Mode Integration with Amazon S3, and there are a whole bunch of new features designed to do...

Use MERGE to Update 1 Million Rows in 2 Seconds

Moshe Goldberg, Vertica System Engineer
May 22, 2017

This blog post was co-authored by Yassine Faihe, Michael Flower, and Moshe Goldberg. Updating One Million Records in Two Seconds To illustrate the true power of MERGE, this article describes how we used MERGE to demonstrate Vertica's performance at scale. SQL MERGE statements combine INSERT and UPDATE operations. They are a great way to update...