Related InterviewSolutions

• Which of the following cannot be used to modify the data in a database(a) update(b) insert(c) delete(d) dropThe question was asked in semester exam.This interesting question is from Modification of Database topic in chapter Introduction to Relational Model and Sql of RDBMS
• Scalar Subqueries can be used in the SQL update statement when they are used under the ____ clause(a) where(b) with(c) set(d) endThis question was addressed to me in semester exam.The query is from Modification of Database in section Introduction to Relational Model and Sql of RDBMS
• State true or false: We cannot write a where clause under an update command(a) True(b) FalseI have been asked this question by my school teacher while I was bunking the class.This interesting question is from Modification of Database in section Introduction to Relational Model and Sql of RDBMS
• To change a value in a tuple without changing all the values in the tuple, we use the _____ statement(a) insert(b) insert some(c) update(d) alterI have been asked this question in an interview for job.I'd like to ask this question from Modification of Database in section Introduction to Relational Model and Sql of RDBMS
• What is the format of entering date into a database while inserting data into it?(a) YYYY-MM-DD(b) “YYYY-MM-DD”(c) ‘YYYY-MM-DD’(d) “DD-MM-YYYY”This question was posed to me in an international level competition.My question is taken from Modification of Database in portion Introduction to Relational Model and Sql of RDBMS
• How many relations can a delete command operate on?(a) 0(b) 1(c) 2(d) Infinitely manyThis question was addressed to me in an internship interview.This interesting question is from Modification of Database in chapter Introduction to Relational Model and Sql of RDBMS
• SQL subqueries that can occur wherever a value is permitted provided the subquery gives only one tuple with a single attribute are called _________(a) Exact Subqueries(b) Vector Subqueries(c) Positive Subqueries(d) Scalar SubqueriesThe question was asked in quiz.My enquiry is from Nested Subqueries topic in section Introduction to Relational Model and Sql of RDBMS
• State true or false: We can use Subqueries inside the from clause(a) True(b) FalseThe question was posed to me in an international level competition.My enquiry is from Nested Subqueries in division Introduction to Relational Model and Sql of RDBMS
• The _________ construct returns true if the argument in the sub-query is void of duplicates(a) not null(b) not unique(c) unique(d) nullThis question was posed to me during an interview.I'd like to ask this question from Nested Subqueries in chapter Introduction to Relational Model and Sql of RDBMS
• What is a correlated sub-query?(a) An independent query that uses the correlation name of another independent query.(b) A sub-query that uses the correlation name of an outer query(c) A sub-query that substitutes the names of the outer query(d) A sub-query that does not depend on its outer query’s correlation namesThe question was asked by my college professor while I was bunking the class.This intriguing question originated from Nested Subqueries in portion Introduction to Relational Model and Sql of RDBMS