Category: RedShift
Redshift Blog Archives, by Peter Whyte (Database Administrator). Includes Redshift Administration blog posts and SQL Scripts.
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Why Use WHERE 1=2 in SQL
In a previous blog post, I explained why WHERE 1=1 is often used in SQL queries. This time, let’s discuss WHERE 1=2 — or any condition that results in a FALSE value, such as WHERE 1=9. Essentially, the point is to use a condition that is guaranteed to…
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Redshift JDBC Driver Download
A handy post to note down the JDBC client driver download. I’m frequently in need of this myself. You can download the JDBC driver from the AWS Docs and then gain your cluster endpoint address from the main Redshift dashboard window Instead of doing the above, you navigate…
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List all Schemas, Tables & Columns in Redshift or Postgres
This post contains a SQL script that will return all schemas, tables and columns in Redshift or Postgres. I’m combining the Redshift and Postgres database blog categories here. Redshift was forked from Postgres and is similar in a lot of ways. One of the feature differences between Redshift…
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Create a Superuser in RedShift
Superusers in RedShift hold the permissions to perform any action in the cluster, the same access as ‘master’ or whatever you named the superuser during creation. Giving Superuser power should only really happen in local test environments, or if it’s a throw-away infrastructure as code (IaC) environment. You…
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Drop Users in RedShift
Dropping users in Amazon Redshift is a simple task, but sometimes you may encounter an error message if the user you are trying to drop is an owner of an object in the database, such as a schema, table, or view. When this happens, you will see one…
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Create a Test AWS RedShift Cluster
Here’s a simple guide on creating a new AWS RedShift Cluster within a personal AWS test environment. Warning, if you’re testing this AWS Service you have to be rigorous with managing the cluster for billing reasons. I delete my cluster right after I’m done with it as you’ll…
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Why use WHERE 1=1 in SQL Queries
A common SQL question is, why would anyone use WHERE 1=1 in their queries? And what does it do? The WHERE 1=1 condition means WHERE TRUE. It returns the same query result as it would without the WHERE Clause. There is no impact on query execution time. This…
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