Monthly Archives: August 2009

Sql server Constraints – Primary Key, Foreign Key, Unique Key, Not Null, Check Constraints

Introduction A constraint is a property that is assigned to a column or a group of columns to prevent incorrect or corrupt data from entering into the tables. These constraints ensure the accuracy and reliability of the data into the … Continue reading

Posted in Most Imp SQL Concepts, SQL Primary Key Constraint, SQL Server | Tagged , , , | 31 Comments