In SQL, the GROUP BY clause is used to put together rows with the same values in some columns into simple groups. It’s often used with total functions like SUM(), COUNT(), AVG() and more to do tasks on every set of rows instead of all the results. The GROUP BY rule helps to join and make data …
Common GROUP BY Error in SQL: A Troubleshooting Guide Read More »
In relational databases, such as Oracle, MYSQL Server, SQL and various others, the data is stored in numerous tables that are connected to one another with the same key value. As a result, there is an ongoing requirement to extract data from two or more tables into a result table based on certain criteria. This …
Joins are one of the remarkable features of SQL, where its ability to join tables together based on common features and the retrieval of data based on certain conditions allows data for the analysis process. In this tutorial, we will learn about the two types of SQL Joins, i.e. Equi Join and Non Equi Join, …
Equi Join and Non-Equi Join in SQL (With Examples) Read More »
In our day-to-day lives, we deal with a large amount of data with a high possibility of inconsistency. So, to filter out data based on a string and specific pattern, SQL provides a flexible way. In this tutorial, we will learn about the LIKE and NOT Like Operators in SQL, which perform pattern matching within …
SQL LIKE and NOT LIKE Operators: A Beginner’s Guide Read More »
In our day-to-day life, we keep our data in various logical tables in the relational database connected through a common key value. As a result, we may need to filter out some data values to get the desired result based on some conditions. And that’s where the JOIN clause comes into the picture. In this …
This tutorial will show some MySQL interview questions with the solutions. If you are applying for the role of MySQL developer, you need to go through these questions before going to the interview. This article compiles all the common questions that you should know. Let’s hop onto the question-answers directly. 1. What is the use …
Top MySQL Interview Questions and Answers (2024) Read More »
SQL language deals with database management, while data is a crucial aspect of machine learning, deep learning, as well as data analysis. For small databases, SQL language may be used for doing a data analysis. In this case, the data analysis will provide an opportunity to analyze the possible data trends and patterns in the …
10 SQL Techniques to Perform Data Analysis: A Beginner’s Guide Read More »
In various models, we deal with the databases that contain information related to the time, date, year, month, and hour. This type of data is mainly present in the database of websites. We need to perform different operations on such type of data and DATEPART() is a function used to perform that operations. In this …
In SQL language, different types of functions, clauses and JOINs are used to make solving complicated problems easy. People often use the Windows functions in many different ways to do complicated tasks with databases. In this article, we are putting the sorting function together with the ranking process. The partition function splits the results into pieces and the …
Using Partitions with Ranking Functions: SQL Window Functions Guide Read More »
In SQL, the GROUPING SETS clause specifies several grouping sets within the same query. This enables aggregation across different columns allowing one to create subtotals or a total of such columns on a single query. It can, therefore, be very useful when you are looking for consolidated data summarized at different levels of detail. In …