Database MCQ Questions

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Constraint checking can be disabled in existing _______________ and _____________ constraints so that any data you modify or add to the table is not checked against the constraint
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2022-07-20
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Isolation of the transactions is ensured by
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SNAPSHOT is used for (DBA)
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2022-07-20
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Which of the following is not a property of transactions
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2022-07-20
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What would be the outcome of the below query?
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Evaluate the following SQL statements in the given order
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A non-correlated subquery can be defined as ______
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2022-07-20
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Which statement is true regarding external tables
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In which scenario would you use the ROLLUP operator for expression or columns within a GROUP BY clause?
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EMPDET is an external table containing the columns EMPNO and ENAME. Which command would work in relation to the EMPDET table?
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2022-07-20
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__________ are used to ensure that transactions access each data item in order of the transactions’ ____ if their accesses conflict
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A concurrency-control policy such as this one leads to ______ performance, since it forces transactions to wait for preceding transactions to finish before they can start
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In concurrency control policy the the lock is obtained on
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