devxlogo

Check if a Primary Key Exists on a Table

Why Trust Us

You can use IF NOT EXISTS?to check whether a Primary Key is missing and add it as follows:

IF NOT EXISTS (SELECT * FROM sys.tables tINNER JOIN sys.schemas s ON t.schema_id = s.schema_idINNER JOIN sys.indexes i on i.object_id = t.object_idWHERE i.is_primary_key = 1AND s.name = 'dbo' AND t.name = 'TableName')ALTER TABLE dbo.TableNameADD CONSTRAINT PK_TableName PRIMARY KEY (Column1) WITH ( ONLINE = ON )

Charlie has over a decade of experience in website administration and technology management. As the site admin, he oversees all technical aspects of running a high-traffic online platform, ensuring optimal performance, security, and user experience.

Disclosure

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

Show More