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Tag: Primary Key Constraint

SQL Server / SQL Server Accidental DBA Series

Primary Key and Unique Key difference in SQL Server

March 27, 2015December 20, 2019 - by SQL Geek - 1 Comment

Primary and Unique Key both enforce uniqueness of columns on which they are defined. Then where do they differ? They differ in following way –          A primary key doesn’t allow null …

Primary Key and Unique Key difference in SQL Server Read More
SQL Server

SQL Server Constraints

January 9, 2014September 10, 2014 - by Edominer Peoplewareindia - Leave a Comment

Hello, SQL Server Constraints can be defined as rules that govern the values that are inserted into a column. These rules help in enforcing data integrity. For example if a NOT …

SQL Server Constraints Read More

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