Which of the following is one of the basic approaches for joining tables ?
A. Subqueries
B. Union Join
C. Natural join
D. All of the Mentioned
Answer:A
Which of the following is one of the basic approaches for joining tables ?
A. Subqueries B. Union Join C. Natural join D. All of the Mentioned
Explanation:The SQL subquery is a SELECT query that is embedded in the main SELECT statement.In many cases, a subquery can be used instead of a JOIN.