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Database Management Systems | Alkhabay Bakgeldi
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Which of the following is NOT a type of anomaly that occurs when a database is not normalized?
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Which of the following aggregate functions does the DISTINCT option not have any effects on?
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If a subquery returns more than one row, which type of operator must be used in the main query?
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When using the AVG() function with GROUP BY, what does the GROUP BY clause do?
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In the INTERSECT operator, what must be true about the data types of the corresponding columns in the participating queries?
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In a correlated subquery, the PostgreSQL evaluation typically proceeds in what direction?
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When the GROUP BY clause is used, the aggregate functions calculate a value for what?
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What is a subquery that contains a reference to a table (in the parent query) that also appears in the outer query called?
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What is a database transaction defined as?
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If a scalar subquery is executed and returns no rows, what is the resulting scalar value taken to be?
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