Interview Questions and Answers for 'Fujitsu' - 2 question(s) found - Order By Newest Q1. What is a self Join and give an example of a self Join ? Database
Ans. When a Table Join itself , it's a Self Join. For example - we like to know the pair of department names where first dept has lesser employees than the later. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 26 Companies basic frequent Related Questions What are Inner , Outer , Left and Right Joins in SQL ? What is JDBC? Describe the steps needed to execute a SQL query using JDBC. What are temp tables ? Do you like Native SQL Apis like JDBC or JPA / Hibernate ? Is there any schema in mongo DB ? Difference between Inner and Outer Join ? What is a Cursor ? Does SQL allow null values ? Can we use it within Where clause ? Write an SQL to find all records having all upper case alphanumeric characters in a field ? This question was recently asked at 'Fujitsu'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Related Questions Difference between == and .equals() ? Why is String immutable in Java ? Explain the scenerios to choose between String , StringBuilder and StringBuffer ? What are the difference between composition and inheritance in Java? Explain OOPs What is a Lambda Expression ? What's its use ? What are different ways to create String Object? Explain. Why Char array is preferred over String for storing password? Does garbage collection guarantee that a program will not run out of memory? What is the difference between final, finally and finalize() ?
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sql joins self join self-join Pair of employee names with first having lesser salary than later Pair of department names where first dept has lesser employees than the later 
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