Stored procedures are particularly useful if a particular task is to be performed repeatedly. An example of such a task might be to migrate data from one database table to another. The procedure contains SQL statementscompiledinto a single execution plan and stored in the database. The procedure...
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.
What are the types of NoSQL databases? There are four types of NoSQL database systems. Each uses a different type of data model, resulting in significant differences between each NoSQL type, noted as follows: This article is part of What is a cloud database? An in-depth cloud DBMS ...
Inprogramming, a storedis a set of programming code (like PL/SQL) that executes a specific query or function. This stored procedure is used to execute one or more series of commands, search for, insert, update or delete data in a database. ...
Technique #1: How to find duplicate values in SQL table Identifyingduplicate valuesin 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. ...
SQL Programming After reading this article you will understand what a database cursor is, see an example, and understand when to use them in a stored procedure. All the examples for this lesson are based on Microsoft SQL Server Management Studio and the sample databases AdventureWorks and WideWo...
SQL is used to declare the data to be returned, and a SQL query processor and query optimizer turn the SQL declaration into a query plan that is executed by the database engine. SQL includes a sub-language for defining schemas, the data definition language (DDL), along with a sub-...
You’ll notice the syntax for a SQL trigger is very similar to that of a stored procedure. In fact, the trigger uses the same language to implement its logic as dostored procedures. In MS SQL, this isT-SQL; whereas in Oracle it isPL/SQL. ...
This section provides a quick introduction of SQL (Structured Query Language), a computer language that allows users to interact with RDBMS to define create data structure and manage data instances.© 2025 Dr. Herong Yang. All rights reserved.What Is SQL? SQL (Structured Query Language) is a...
Learn what a SQL Query is and the fundamentals of the SQL SELECT statement, which is used to query the database for useful information.