In this article, we will delve deeply into “Create Query in SQL”. Let’s get started.

What is use of Create Query in SQL ?
The use of the CREATE
query in SQL is to create or define various database objects and elements within a relational database management system (RDBMS). These objects and elements can include tables, indexes, views, stored procedures, functions, databases, schemas, triggers, users, and roles, among others.
Let’s now look how we can create these Database Objects and elements using Create query in SQL.
Create Table Query in SQL
The CREATE TABLE
query in SQL is used to define and create tables within a database.
Example:
This query creates a table named “employees” with columns for employee ID, name, salary, and hire date.
Create an Index in SQL
Indexes are used to improve the speed of data retrieval. Here’s how you can create an index:
This query creates an index named “idx_employee_name” on the “employee_name” column of the “employees” table.
Create a View in SQL
Views are virtual tables that provide a simplified way to access data. To create a view, you can use the CREATE VIEW
statement:
This query creates a view named “employee_names_salaries” that displays only employee names and salaries from the “employees” table.
Create a Stored Procedure in SQL
Stored procedures are sets of precompiled SQL statements that can be executed. Here’s an example of creating a stored procedure:
Create a User-Defined Function
User-defined functions allow you to encapsulate custom logic. Here’s an example of creating a scalar function:
This query creates a scalar function named “CalculateSquare” that calculates the square of the input number.
Create a Database
To create a new database in SQL, you can use the CREATE DATABASE
statement:
This query creates a new database named “MyDatabase.”
Create a Schema
Schemas are used to organize database objects within a database. You can create a schema using the CREATE SCHEMA
statement:
This query creates a new schema named “MySchema.”
Create a Trigger
Triggers are special types of stored procedures that are automatically executed when specific events occur in the database. Here’s an example of creating a trigger:
This query creates a trigger named “AuditEmployeeChanges” that fires after an update operation on the “employees” table.It captures changes made to the employees
table and inserts the relevant information into the employee_audit
table.
Create a User
To create a new user account in SQL, you can use the CREATE USER
statement:
This query creates a new user named “MyUser” with the specified password.
Create a Role
Roles are used to group users and manage permissions. You can create a role using the CREATE ROLE
statement:
This query creates a new role named “MyRole.”
Conclusion: Create Query in SQL
This article has provided a comprehensive overview of the “CREATE Query in SQL” and its versatile applications in defining and creating various database objects and elements within a relational database management system (RDBMS). We explored the creation of tables, indexes, views, stored procedures, user-defined functions, databases, schemas, triggers, users, and roles, showcasing their individual syntax and usage.
Related Articles: