Introduction: In the realm of data management, maintaining clean and consistent data is of utmost importance. One common issue that arises is inconsistent naming conventions within tables. Fortunately, SQL provides…
The problem of finding top-performing ads is a popular SQL question in Data Science interviews. So, if you want to know how to solve this problem, this article is for…
What is Normalization? Normalization is a crucial database design technique used to improve data organization and eliminate anomalies like Insertion, Update, and Deletion Anomalies. By applying normalization rules, larger tables…
You can use the ISNULL function in SQL to convert an empty string to a null DateTime value: Assuming you are using SQL Server, you can use the TRY_CONVERT() function…
Duplicate data can be a common problem in databases, and removing it is an important step in maintaining the quality of your data. In SQL, there are a few ways…
To sort records in SQL, you’ll need to use the ORDER BY clause. In this article, I’ll explain in detail how to use ORDER BY to sort output by one or more…
In this article, we’ll examine how you can use LIKE Operator in SQL to search substrings. We’ll also make the distinction between SQL exact match and SQL partial match by explaining how you can…
Use the SQL LOWER() function if you want to convert a string column to lowercase. This function takes only one argument: the column whose values you want to lowercase. Our database has…
Question 1: What is an index? What are the two main index types? An index is a structure in a database that can help retrieve data faster. When you search…
Data is information and to organize this data, you require a Database. This article on What is a Database will help you understand the definition, the different types, their advantages…