Description: The unique constraint name in a database refers to the designation given to a constraint that ensures that values in a column or a set of columns are unique across the table. This means that records cannot be inserted with duplicate values in the specified columns, helping to maintain data integrity. Unique constraints are fundamental in database design as they allow for the unambiguous identification of each record, similar to how a personal identification number (PIN) distinguishes each individual. Additionally, these constraints can be applied to one or more columns, providing flexibility in defining uniqueness. In SQL, a unique constraint can be defined when creating a table or modifying it later, using the UNIQUE clause. This feature is particularly useful in applications where data accuracy and uniqueness are critical, such as in database management systems, inventories, or financial records.
