Writing long queries in SQL can be very complex especially when dealing with JOINS and subqueries. Then in the Oracle 9i, Oracle introduced SQL WITH Clause which improves the speed of complex subqueries. In this tutorial, we will learn about the SQL WITH clause with some examples for better understanding. What is WITH Clause? The …
There are many terms in SQL whose usage is almost similar and when it comes to implementing them, it always leads to confusion among developers. Correlated Subquery and Noncorrelated Subquery are one of them. Understanding the distinction between them is important for optimizing SQL queries to receive desired output. In this tutorial, we will learn …
Difference Between Correlated and Noncorrelated Subqueries in SQL Read More »
SQL language provides a wide variety of functions, clauses, JOINs, etc. that help to provide additional features to solve complex problems. One more thing that SQL language has is the CTE. CTE stands for ‘Common Table Expression’. It’s a momentary result set that you can reference within a SELECT, INSERT, UPDATE, or DELETE statement in …
We can face many errors while implementing various queries in SQL. Different errors arise due to wrong syntax or implementation defects. In this article, we are going to review the error handling techniques for one of the common errors which is ‘MySQL.user’ is not of type ‘base table’. The error message ‘MySQL.user’ is not of …
How To Fix Error ‘MySQL.user’ is not of type ‘base table’ – Easy Guide Read More »
In different Machine learning and Data analytics models, we have to deal with large datasets with an ‘N’ number of columns and rows. Sometimes, we need to find the difference between the data values of the rows. In this article, we will see some queries to find the difference between the rows. Let’s start with …
Calculating the Difference Between Two Rows in SQL Read More »
For different business models, we need to use financial analysis techniques that help us analyze the business adequately. The financial analysis carried out in a business model is important as it helps to determine the weaknesses and strengths of different factors involved with the investment. The SQL queries enable financial analysis of different business models. …
We handle databases with the help of SQL queries. Complex problems require logical solutions. These logical solutions may be long sometimes. Problems based on data pipelines require very lengthy solutions. These types of queries are 1000 lines long in some cases. The long SQL queries contain different functions, clauses, and joins. Sometimes, queries also consist …
How to Organize Long SQL Queries: A Detailed Guide Read More »
SQL language provides a wide range of clauses, statements, functions, and JOINs to ease the complexity of the various models. Have you ever heard about the CTE and VIEW in SQL? The CTE is a Common Table Expression that is frequently utilized in complex problems to increase the readability of the overall model. On the …
PostgreSQL occupies an important place in database management with a rich set of built-in functions. Among these, the PostgreSQL string function is particularly noteworthy because of its flexibility and adaptability to text data in a database. For developers working on any product, software, or technology related to data binding, the familiar PostgreSQL string function can …
In PostgreSQL, managing and extracting data from string is one of the common requirements in database operations. We often deal with strings that contain delimited values, PostgreSQL provides various functions to facilitate the data extraction part efficiently. One such function is SPLIT_PART. In this tutorial, we will learn about the syntax, parameters and practical examples …
PostgreSQL SPLIT_PART() Function (Multiple Examples) Read More »