Question : An attribute that uniquely identifies the rows of a table is known as the ----- key.
Option 1: primary
Option 2: candidate
Option 3: composite
Option 4: foreign
Correct Answer: primary
Solution : The correct option is primary .
The main key is a characteristic used to uniquely identify each row in a table. A column, or collection of columns, known as the primary key, is what gives each entry in the table its unique identity. Null values are not permitted in the main key; instead, it must include unique values. There may only be one primary key per table, and the table may contain one or more columns (fields).
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