Learn what is Cursor in SQL with the help of examples. SQL cursor is a database object that is used to manipulate and traverse the result set of a SELECT query.
Example with employees Example with countries Time to Practice LEFT JOIN! Get to know the details of LEFT JOIN, one of the most common SQL JOIN types. SQL is mainly about getting data from databases. Very often, you’ll need data to be combined from multiple tables in your database. That...
When user fetches a data from left table and right table as well as its common records then this kind of join is known as Outer join. This is also one of the important join used in most of the real life scenarios. Outer join displays the common matching records between two tables and ...
I have already explained about SQL joins in other articles. Here in this article my focus is on SQL join examples for equi join and non equi join. The most used concept in real life scenarios are nothing but SQL Joins. Although in reporting, stand alone applications development, Web applicat...
Martin Heller写的这篇文章《What is SQL? The lingua franca of data analysis》,介绍了SQL、关系型数据库的基础知识,包括发展历史、SELECT、JOIN、存储过程等,虽然是英文,但单词较简单,算科普了。 原文链接, https://www.infoworld.com/article/3219795/what-is-sql-the-lingua-franca-of-data-analysis.html ...
Technique #1: How to find duplicate values in SQL table Identifying duplicate values in a database is essential for maintaining data integrity and accuracy. To find duplicate values in an SQL table, you can utilize the “GROUP BY” and “HAVING” clauses along with aggregate functions. This...
Use Non-Equi Join to Check From Duplicate Values In this example, we’re going to check forduplicate values. We’ll use the person table as our example. We’ll be looking at the first name and last name. What we’ll be doing is checking the table to see if there are any rows that...
The RIGHT OUTER JOIN is the same as LEFT OUTER JOIN except that all the right tables’ data are returned along with the common data.We use RIGHT OUTER JOIN in the cases where we need all the values from the right table, but the left table’s values are optional.SELECT t1.ID AS [...
For more information on added features, seeWhat's new in SQL Server 2022. SQL Server 2019 (15.x) SQL Server 2019 (15.x) adds these new features: Functional Starting with SQL Server 2019 (15.x), the tuple mover is helped by a background merge task that automatically compresses smaller...
Starting with SQL Server 2022 (16.x) Cumulative Update 6, you can configuretransactional replication with Microsoft Entra authentication- generally available (GA) in Cumulative Update 12. Always encrypted with secure enclavesSupport for JOIN, GROUP BY, and ORDER BY, and for text columns using UTF...