Introduction to SQL Which of the following join is also called as an 'inner-join'? Self-Join Non-Equijoin None of these Equijoin Self-Join Non-Equijoin None of these Equijoin ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Count function in SQL returns the number of values. distinct values. groups. columns. values. distinct values. groups. columns. ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL What operator tests column for the absence of data? IS NULL operator None of these NOT operator EXISTS operator IS NULL operator None of these NOT operator EXISTS operator ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL A subquery in an SQL SELECT statement: can always be duplicated by a join. can only be used with two tables. cannot have its results sorted using ORDER BY. has a distinct form that cannot be duplicated by a join. can always be duplicated by a join. can only be used with two tables. cannot have its results sorted using ORDER BY. has a distinct form that cannot be duplicated by a join. ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Each index consumes extra storage space and also requires overhead maintenance time whenever indexed data change value. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The SELECT statement SELECT 'Hi' FROM DUAL WHERE NULL = NULL; Outputs FLASE TRUE Nothing Hi FLASE TRUE Nothing Hi ANSWER DOWNLOAD EXAMIANS APP
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