SQL - Interview Questions and Answers for 'Sql join' | Search Interview Question

SQL - Interview Questions and Answers for 'Sql join' - 6 question(s) found - Order By Rating

Q1. What is the minimum number of tables required to perform a SQL join?

Database

Ans. 1 , We can do self join

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve sql join Asked in 1 Companies}

Q2. Describe SQL Joins

Database

Ans. Oracle having following types of joins these are also called 8i joins. There are:

1. Equi (or) Inner join
2. Non Equi join
3.Self join
4.Outer join

Oracle also support the 9i (or) ANSI standard joins.There are:

1.Inner join
2.Left outer join
3.Right outer join
4.Full outer join
5.Natural join

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve sql joins sql Asked in 2 Companies}

Q3. If Table A has 0 records and Table B has 50 records , how many records will the equi join of Table generate ?

SQL

Ans. 0 records

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve database sql sql joins equi join}

Q4. If Table A has 100 records and Table B has 50 records , how many records will the right join of Table A with Table B generate ?

SQL

Ans. 50 records

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve database sql sql joins right join}

Q5. If Table A has 100 records and Table B has 50 records , how many records will the left join of Table A with Table B generate ?

SQL

Ans. 100 records

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve database sql sql joins left join}

Q6. If Table A has 100 records and Table B has 50 records , how many records will the equi join of Table generate ?

SQL

Ans. It depends on the join condition.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve equi join sql join database sql}

Q7. In majority of the cases, the following join will give maximum number of results ? Reference

Database

a. Inner Join

b. Outer Join

c. Left Join

d. Right Join

Ans.b. Outer Join

Q8. Which if the following is true for SQL Joins ? Reference

Database

a. Left Join and Right Join gives equal number of Results

b. Outer Join and Inner Join gives equal number of Results

c. Inner Join gives maximum number of results records

d. Inner Join gives minimum number of result records

Ans.d. Inner Join gives minimum number of result records

Search Interview Questions

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.