Introduction to SQL What operator tests column for the absence of data? None of these EXISTS operator NOT operator IS NULL operator None of these EXISTS operator NOT operator IS NULL operator ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL SUM, AVG, MIN, and MAX can only be used with numeric columns. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The SELECT statement SELECT 'Hi' FROM DUAL WHERE NULL = NULL; Outputs TRUE FLASE Nothing Hi TRUE FLASE Nothing Hi ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL A subquery in an SQL SELECT statement: has a distinct form that cannot be duplicated by a join. can only be used with two tables. cannot have its results sorted using ORDER BY. can always be duplicated by a join. has a distinct form that cannot be duplicated by a join. can only be used with two tables. cannot have its results sorted using ORDER BY. can always be duplicated by a join. ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Indexes can usually be created for both primary and secondary keys. False True False True ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS