define secondary key
a secondary key
Secondary Sort Key
secondary index is a key which is created other than primary key, to speed up processing.
Secondary Sort Key
secondary sort key
A secondary key is a field that is identified as being suitable for indexing the data such as a surname, It is used to sort the data in a different order to the primary key, A table can have many secondary keys in fact every field could be a secondary key. Hope this helps !
A candidate key is a unique key that can uniquely identify each record in a database table, whereas a secondary key is a non-unique key used for data retrieval and indexing purposes. Candidate keys can be chosen as the primary key for the table, while secondary keys provide alternate ways to access and organize the data.
An attribute or set of attributes that is basis for retrieval is known as secondary key for example, address in student table can be used to display all students who are living in a particular city. in this case, address will be used as secondary key
A Primary Key is a unique identifier for each record in a database table and is used to enforce entity integrity. A Secondary Key is a non-unique index that is used for querying and organizing data efficiently but does not have the constraint of uniqueness.
The primary key is the field containing unique values that aid in database operations. The secondary key is used in addition or as an alternate to the primary key. Both are candidate keys, it's just that one was chosen to be primary.
There are no "primary and secondary keys" in c and c plus plus.
secondary key