How to create trigger by CREATE TRIGGER STATEMENT in SQL

In SQL, a trigger is a special type of stored procedure that is automatically executed in response to certain events or actions, such as inserting, updating, or deleting data from a table. Triggers can be used to enforce business rules, ensure data consistency, or audit changes to the database. To create a trigger in SQL, […]

What Are Trigger and how to take its advantage in SQL

In SQL, a trigger is a database object that is used to automatically execute a specified set of instructions in response to certain events or changes within a database. Triggers can be used to enforce business rules, maintain data integrity, and automate data-related processes. A trigger consists of a trigger event, a trigger condition, and […]

How to return results from a stored procedure in SQL?

Stored procedures are widely used in SQL for encapsulating complex database operations into a single unit that can be easily called from an application. Sometimes, stored procedures need to return results back to the calling application. In this case, the procedure can be defined to return a result set or a single value using a […]

How to pass parameters to a stored procedure in SQL

Stored procedures in SQL can accept parameters as inputs, which allows for more flexibility in their use. Parameters can be of various data types and can be used to customize the behavior of the stored procedure based on different input values. To pass parameters to a stored procedure, you first need to define them in […]

Stored procedure: Learn now how to call a stored procedure in SQL

To call a stored procedure in SQL, you use the CALL statement, followed by the name of the stored procedure and its parameters (if any). Here’s the basic syntax for calling a stored procedure: Where stored_procedure_name is the name of the stored procedure you want to call, and param1, param2, etc. are the parameters that […]

Learn now How to use CREATE PROCEDURE command in SQL

A stored procedure is a precompiled SQL statement or set of statements that can be executed on demand. It is a subroutine that can be called by other SQL statements and applications. Stored procedures can be used to encapsulate business logic, enforce security policies, and improve performance by reducing network traffic.Creating a stored procedure in […]

Learn now How to use Correlated subquery in SQL

In SQL, a correlated subquery is a subquery that references a column from the outer query. The subquery is executed for each row of the outer query, which makes it slower than a regular subquery. However, it allows you to filter or sort the results of the subquery based on the values of the outer […]

Learn now how to use Nested query in SQL

In SQL, a nested query, also known as a subquery, is a query inside another query. A nested query is typically used to retrieve more specific data based on the results of the outer query. In other words, a nested query is a query that is nested inside another query. The basic syntax for a […]

Subquery in SQL: Let’s Learn How to use it ?

A subquery in sql is a query that is nested inside another query, also known as an inner query. It is used to retrieve data that will be used as input for the main query, also known as the outer query. The inner query is executed first and returns a temporary result set that is […]

Learn now How to use CROSS JOIN in SQL?

The CROSS JOIN in SQL is used to join two or more tables by combining each row of the first table with each row of the second table and so on. It returns the Cartesian product of the two tables, meaning it will return all possible combinations of rows from both tables. Here’s an example: […]