How to create table in ServiceNow or custom table in ServiceNow?

Creating a table in ServiceNow, or a custom table, involves defining a new data structure to store and manage specific types of information. Here are the general steps to create a custom table in ServiceNow:

1. Navigate to Application Navigator:Log in to your ServiceNow instance.Use the Application Navigator (left-hand menu) to access the "System Definition" module.
2. Create Table:Under "System Definition," select "Tables."Click on the "Create Table" module.
3. Fill in Table Details:Provide the necessary details for your table, such as "Name," "Label," and "Application" (where the table will be created).Choose the appropriate "Table" extension. For custom tables, you'll typically use the "Custom" extension. Click "Submit" to create the table.
4. Define Fields:Once the table is created, navigate to the "Columns" tab to define the fields (columns) for your table. Click "New" to add a new field and provide details like "Name," "Label," "Type," and any other relevant configurations. Save the field configuration.
5. Configure Field Properties:Configure additional properties for each field as needed, such as mandatory, read-only, or unique.Set the appropriate data type for each field, like text, integer, reference, etc.
6. Configure Relationships (if needed):If your table needs to have relationships with other tables, configure relationships by defining reference fields.
7. Configure Business Rules (if needed):Implement business rules to automate actions and enforce business logic on your custom table. Navigate to "Business Rules" in the "System Definition" module.
8. Configure Access Control (if needed):Set up access control rules to define who can read, write, or delete records in your custom table. Navigate to "Access Control" in the "System Security" module.
9. Configure UI Policies and Catalog Client Scripts (if needed):Customize the user interface by creating UI policies or client scripts if additional logic or behavior is required.
10. Save and Test:Save your changes and test your custom table by adding records, updating data, and ensuring that the defined business rules and behaviors are functioning as expected.

These steps provide a high-level overview of creating a custom table in ServiceNow. Keep in mind that the specific steps and options might vary slightly depending on your version of ServiceNow. Refer to the official ServiceNow documentation or consult your ServiceNow administrator for version-specific details and best practices.