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 are JOINS? Joins help retrieving data from two or more database tables. The tables are mutually related using primary and foreign keys. Types of joins Cross JOIN, INNER JOIN ,Outer…
SQL questions for Data Analysts :Frequently Asked SQL Interview Questions and Answers for Freshers and Experienced 1. What is DBMS? A Database Management System (DBMS) is a program that controls…
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…
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…
Q1. What are the different subsets of SQL? Data Definition Language (DDL) – It allows you to perform various operations on the database such as CREATE, ALTER, and DELETE objects.…