SQL - Primary Key. A primary key is a field in a table which uniquely identifies each row/record in a database table. Primary keys must contain unique values. A primary key column cannot have NULL values. A table can have only one primary key, which may consist of single or multiple fields. When multiple fields are used as a primary key, they are called a composite key.
Noun. 1. marginalization-the social process of becoming or being made marginal (especially as a group within the larger society); the marginalization of the underclass; the marginalization of literature. marginalisation. social process-a process involved in the formation of groups of persons.
1 The term ethnic minority is often used to refer to marginalized cultural groups. 2  Literature that is widely taught today includes writings by women and members of other historically marginalized groups.reat (a person, group, or concept) as insignificant or peripheral: by removing religion from the public space, we marginalize it (as adjective marginalized) members of marginalized cultural groups. More example sentences. 1  The term ethnic minority is often used to refer to marginalized cultural groups.