The relational database such as Teradata support SQL comparison operators, including ALL, ANY and SOME. Some databases refer ALL, ANY and SOME as a SQL logical operator. A logical operators is an operator applied to the result of a predicate to determine the result of a search condition. Amazon Redshift does not support ALL, ANY and SOME logical operators. In this article, we will check what are ALL, SOME, ANY comparison operators alternatives in Redshift. SQL Logical Operators ALL, SOME and ANY Before jumping into details about alternative approach, let…

If you’re familiar with Teradata, you might have used the QUALIFY clause to filter the results of ordered analytical functions. Amazon Redshift also started supporting QUALIFY clause. In this blog post, we’ll explore what the QUALIFY clause does, why it’s useful, and how you can achieve similar functionality in Redshift. Page Content Introduction What is the QUALIFY Clause? How QUALIFY Clause is used in Redshift? Alternatives to the QUALIFY Clause Conclusion Introduction The QUALIFY is one of the important clause as it helps filter results using window functions, similar to how the HAVING clause…

There are many situations where you need to pre-process the received data in order to store it in the data warehouse. For instance, you many receive currency data with currency symbol. You have pre-process currency column to remove the dollar ($) symbol and store clean value in the database. Amazon Redshift support TO_NUMBER function, you can use it to remove unwanted characters from numeric value. In this article, we will check how to use TO_NUMBER type conversion function with its different format. We will also check different examples to use…

Amazon Redshift supports many built-in functions that you can use to perform day to day activities such as extracting only date part from a timestamp value. Redshift provides many date and string functions that you can use to play around date type. In this article, we will check how to use an Amazon Redshift trunc and date_trunc functions, syntax, usage, examples and difference between these two functions. Redshift Trunc and Date_Trunc Functions You can use the trunc and date_trunc functions to trunc certain portions of the date type. However, you…