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

 Q1. If Table A has 100 records and Table B has 50 records , how many records will the equi join of Table generate ?SQL2017-07-14 17:59:56

Ans. It depends on the join condition.

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 Q2. 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 ?SQL2017-07-14 18:00:37

Ans. 100 records

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 Q3. 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 ?SQL2017-07-14 18:01:01

Ans. 50 records

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 Q4. If Table A has 0 records and Table B has 50 records , how many records will the equi join of Table generate ?SQL2017-07-14 18:01:50

Ans. 0 records

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 Q5. Describe SQL JoinsDatabase2018-02-08 00:11:24

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

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 Q6. What is the minimum number of tables required to perform a SQL join?Database2019-01-31 20:36:43

Ans. 1 , We can do self join


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


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