Question

. Consider the table with structures:
Student(ID, name, dept_name, tot_cred)
In the above table, which attribute will form the primary key?​

Answer 1

Answer:

In this query which attributes form the primary key is ID

Explanation:

Step 1:  The attributes name, dept and tot_cred can have same values unlike ID.

Step 2:The union operator demands that both relationships be compatible with unions. This implies that they must share a common set of qualities. A relation name and a collection of its characteristics make up a relation schema. Each characteristic identifies a particular domain's involvement in the relational scheme. The table's columns are referred to as attributes. The table's rows are referred to as tuples. A relation or table is the grouping of all such rows. A database is a collection of these sorts of relations.

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