Redshift

How to use Amazon Redshift Replace Function?

The Amazon Redshift REPLACE function is one of the important string functions. The replace function allows you to manipulate the string in Amazon Redshift. This string function is similar to translate and regexp_replace functions. Amazon Redshift Replace Function Page Contents Introduction to Amazon Redshift Introduction to Amazon Redshift Syntax of the Redshift Replace Function Redshift Replace Function Example Usage of the Redshift Replace Function Best practices for using the Redshift Replace Function Conclusion Introduction to Amazon Redshift Amazon Redshift is a fully managed, cloud-based data warehouse service offered by Amazon…

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March 13, 2023
Redshift

How to Optimize Query Performance on Redshift?

In most of the cases, we pay lots of attention to improve the performance of the web application, but ignore the back-end SQL performance tuning. Amazon Redshift is a fully managed, petabyte-scale, massively parallel data warehouse that offers simple operations and high performance. Amazon Redshift can run a data model such as production transaction system third-normal-form model, star and snowflake schemas, data vault, or simple flat tables. This article takes you through the most common performance-related opportunities when writing query in Amazon Redshift and gives you concrete guidance on how to optimize…

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January 31, 2023
Redshift

Redshift RSQL Control Statements – IF-ELSE-GOTO-LABEL

Amazon Redshift is a data warehousing service provided by Amazon Web Services (AWS). It allows users to store and analyze large amounts of data in a scalable and cost-effective manner. Amazon AWS Redshift RSQL is a command-line client for interacting with Amazon Redshift clusters and databases. Redshift RSQL is similar to Teradata BTEQ and is used to interact with the data stored in a Redshift cluster. In this article, we will check Amazon Redshift RSQL control statements such as IF, ELSE, GOT, LABEL,etc. Redshift RSQL Control Statements Amazon Redshift RSQL…

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January 27, 2023
General

DBT – Export Snowflake Table to S3 Bucket

dbt stands for data build tool is a data transformation tool that enables data analysts and engineers to transform data in a cloud analytics warehouse. dbt basically focuses on the Transformation part in ELT (Extract, Load, Transform) processes. It supports cloud data warehouses such as Snowflake, Redshift, etc. In this article, we will check how to export your Snowflake table to S3 bucket from dbt. DBT - Export Snowflake Table to S3 Bucket What is dbt? Before going into details on exporting Snowflake table to S3 bucket using DBT, let us…

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September 30, 2022
Redshift

Amazon Redshift Delete with Join Syntax and Examples

Data is an integral part of decision making system. Many application reply on a data to make business decisions. In the relational database world, data is stored in the form of tables. Today, we have unlimited storage, but cost is also high to manage storage. Data is collected over the time and it may or may not be accurate. You may have to clean the data by deleting unwanted records or purge the old data from a system that is outdated. In this article, we will discuss Amazon Redshift delete…

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July 6, 2022
Redshift

Redshift WHERE Clause with Multiple Columns

Many relational databases such as Teradata and Oracle supports the multiple columns in WHERE clause. You use two or more columns in predicates. When you want to migrate to cloud databases such as Amazon Redshift, you always look for compatible SQL patterns on the target side. In this article, we will check one of such pattern that is Amazon Redshift WHERE clause predicate with multiple columns. What is a WHERE Clause? Before going into details, first let us check what is a where clause in general. The WHERE clause contains…

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July 6, 2022
Redshift

Psql Invalid Value for Parameter client_encoding – Redshift

In my other article, we have seen steps to connect to Redshift cluster using PostgreSQL PSQL. When you connect to Amazon Redshift from Windows command prompt, you may experience the client encoding issue. In this article, we will check how to resolve "psql: FATAL: invalid value for parameter "client_encoding": "WIN1252"" issue. This is issue is mostly seen when connecting using Windows command prompt. Postgres PSQL Introduction PSQL is a terminal-based front-end to PostgreSQL. It enables you to type in queries interactively, issue them to PostgreSQL, and see the query results. Since Redshift…

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April 5, 2022
Redshift

Redshift CASE Statement, Usage and Examples

In general, the CASE expression or command is a conditional expression, similar to if-then-else statements found in other languages. CASE is used to specify a result when there are multiple conditions. In this article, we will check how to use Redshift CASE Statement, its syntax and usage with some examples. Post Content Introduction to Redshift CASE Statement Syntax and Examples of CASE Statements in Redshift Simple CASE Statements Searched CASE Statements Usage of CASE Statements in Redshift CASE Statements with Aggregation Redshift CASE Statement with Windows Functions Redshift CASE Statement…

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August 22, 2019