JOINS in SQL: INNER, OUTER, LEFT, RIGHT, CROSS
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…
What is Normalization? What is 1NF, 2NF, 3NF, and BCNF in Database Normalization
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…
Top SQL Interview Questions and Answers
Top SQL Interview Questions and Answers (Must Prepare)
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…
earn about SQL commands such as DML, DDL, DCL, TCL, and DQL, and how they are used to manipulate and query data in a database. This guide includes query examples and explanations to help you better understand how to use each command effectively. Master the art of SQL today
Mastering SQL Commands: DML, DDL, DCL, TCL, DQL With Query Examples
What is SQL? SQL is a database language designed for the retrieval and management of data in a relational database. SQL is the standard language for database management. All the RDBMS…
How to CONVERT Empty String To Null DateTime in SQL?
How to CONVERT Empty String To Null DateTime in SQL?
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…
What is Data Science? How to get Job as Data Scientist?
“Data really powers everything that we do.” Learning things from data or making data speak is Data Science. Now, we are ready to talk about what data science is. It’s…
How to remove duplicate rows in SQL
How to remove duplicate rows in SQL?
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…
ORDER BY CLAUSE IN SQL
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…
How to Use LIKE Operator in SQL: SQL Pattern Matching
How to Use LIKE Operator in SQL: SQL Pattern Matching
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…
How to Convert a String to Lowercase in SQL
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…