![]() Index: An index is virtually identical to the index of a book. It refers to multiple columns due to a column lacking a unique quality. This value cannot appear twice within a table, and there is only one row associated with it.įoreign Key: A foreign key is used as a a link between two tables.Ĭompound Key: A compound key, or composite key, is a key that refers to multiple columns. Primary Key: Primary key is a unique identifying value. Redundancy: The term redundancy specifies how to store data twice in order to accelerate the system. It is also known as a tuple, entry, or record. Row: A row is a structure which stores related data. ![]() It is a structure which holds same type of data. Table: A table is a matrix like structure which contains data.Ĭolumn: A column is s data element. MariaDB :ĭatabase: A database is a data store which contains table and holds related data. ![]()
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