To uniquely identify a row in the table (i.e., no duplicates allowed)
The FN key is reliable for all F key needs. However, if the FN key is selected twice it will separate primary function from dual function.
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An alternate key is a set of one or more attributes in a database that can uniquely identify a record, similar to a primary key, but is not designated as the primary key. Its primary function is to provide additional means of accessing data efficiently, ensuring that each record remains unique. Alternate keys enhance data integrity and flexibility in querying the database. They are particularly useful for enforcing business rules and improving search capabilities.
I think super key is treated as the primary key because in a table their will be only one primary key.
waht is a primary function in computer?
There are five types of keys in database management system . The name of the five keys are as follows .:1) surrogate key -which is the system generated primary key .2) Primary key - same function as surrogate key but user defined.3) candidate key -combination of two more keys.4) alternate keys - alternative for candidate keys.5) foreign key - primary key of another table.There are five types of keys in database management system.These five keys are surrogate, primary, candidate, alternate, foreign keys .
The word circulatory is the key word. The circulatory system circulates blood throughout the body.
Importance of primary key
We know that primary key is the one that is not null and is always unique. A primary key uniquely identifies a record in a table.
Primary key that is used to identify a record uniquely. Primary key is a key that always unique and not null. A system generated primary key is called surrogate key.Primary key is the one which is always unique and not null. Advantage of primary key that it helps in identifying a tuple uniquely.
Primary key is to set property ID as the primary key for the properties table.
The primary function of the reproductive system is to generate new species. This function is commonly referred to as procreation.