The ROW NUMBER window function has a wide range of uses, much beyond the apparent ordering requirements. Most of the time, while computing row numbers, you need to do it in a specified order, which you provide in the function's window order clause.
SQLrevisited
Blog to learn about SQL, database, Oracle, SQL Server, MySQL, PostgreSQL concepts and much more.
Wednesday, October 16, 2024
How to filter data in SQL? WHERE, LIKE, and BETWEEN Example
Difference between Primary and Foreign key in Database and SQL
Wednesday, October 2, 2024
How to concatenate columns in SQL Server? Example Tutorial
Hello guys, welcome to my new blog SQLrevisited. I have long back created this blog to exclusively share SQL and Database articles but never get time to start it until today. This is the first article on this blog and in this post, you will learn how to contact multiple columns in an SQL server. Like Java and many other programming languages and databases, you can use the + operator to concatenate multiple columns in SQL Server. You can join as many columns as you want with the + operator but you must remember that concatenating with NULL will produce NULL, which means you can lose the information from other columns if one of them is NULL.
Thursday, September 5, 2024
Top 6 Free SQL Books For Beginners and Experienced [PDF + Online]
There is no doubt that SQL is one of the most essential skills for Programmers, IT professionals, Software Engineers, Quality Analysts, Project Manager, Data scientists, Database admins, and Business Analysts. I had even mentioned this as one of the top skills in my post about 10 things every programmer should know, if you haven't read that yet, you can read it here, it's completely worth your time. Since many Enterprise applications use the relational database at their backend, like Oracle, Microsoft SQL Server, MySQL, it's crucial to learn SQL to work with those applications and use the data stored on those databases.