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Which of the following statements is false?
  • a)
    When applied to a relation declaration, the clause check(P) specifies a predicate P that must be satisfied by every tuple in a relation.
  • b)
    Rollback causes the current transaction to be rolled back i.e. the database state is restored to what it was before the last statement of the transaction was executed.
  • c)
    If the actual relations used in the view definition change, materialized view is kept up-to-date. 
  • d)
    The value of the scalar subquery expression is the value of the select list item of the subquery. If the subquery returns 0 rows, the value of the scalar subquery expression is NULL 
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the following statements is false?a)When applied to a relatio...
Option 2 is incorrect.
Rollback causes the current transaction to be rolled back; that is, it undoes all the updates performed by the SQL statements in the transaction.Thus, the database state is restored to what it was before the first statement of the transaction was executed.
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Which of the following statements is false?a)When applied to a relation declaration, the clause check(P) specifies a predicate P that must be satisfied by every tuple in a relation.b)Rollback causes the current transaction to be rolled back i.e.the database state is restored to what it was before the last statement of the transaction was executed.c)If the actual relations used in the view definition change, materialized view is kept up-to-date.d)The value of thescalar subqueryexpression is the value of the select list item of thesubquery. If thesubqueryreturns 0 rows, the value of thescalar subqueryexpression is NULLCorrect answer is option 'B'. Can you explain this answer?
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Which of the following statements is false?a)When applied to a relation declaration, the clause check(P) specifies a predicate P that must be satisfied by every tuple in a relation.b)Rollback causes the current transaction to be rolled back i.e.the database state is restored to what it was before the last statement of the transaction was executed.c)If the actual relations used in the view definition change, materialized view is kept up-to-date.d)The value of thescalar subqueryexpression is the value of the select list item of thesubquery. If thesubqueryreturns 0 rows, the value of thescalar subqueryexpression is NULLCorrect answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which of the following statements is false?a)When applied to a relation declaration, the clause check(P) specifies a predicate P that must be satisfied by every tuple in a relation.b)Rollback causes the current transaction to be rolled back i.e.the database state is restored to what it was before the last statement of the transaction was executed.c)If the actual relations used in the view definition change, materialized view is kept up-to-date.d)The value of thescalar subqueryexpression is the value of the select list item of thesubquery. If thesubqueryreturns 0 rows, the value of thescalar subqueryexpression is NULLCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is false?a)When applied to a relation declaration, the clause check(P) specifies a predicate P that must be satisfied by every tuple in a relation.b)Rollback causes the current transaction to be rolled back i.e.the database state is restored to what it was before the last statement of the transaction was executed.c)If the actual relations used in the view definition change, materialized view is kept up-to-date.d)The value of thescalar subqueryexpression is the value of the select list item of thesubquery. If thesubqueryreturns 0 rows, the value of thescalar subqueryexpression is NULLCorrect answer is option 'B'. Can you explain this answer?.
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