Introduction to SQL What operator tests column for the absence of data? EXISTS operator IS NULL operator NOT operator None of these EXISTS operator IS NULL operator NOT operator None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Most companies keep at least two versions of any database they are using. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL A subquery in an SQL SELECT statement is enclosed in: brackets -- [...]. braces -- {...}. CAPITAL LETTERS. parenthesis -- (...) . brackets -- [...]. braces -- {...}. CAPITAL LETTERS. parenthesis -- (...) . ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The SQL keyword(s) ________ is used with wildcards. LIKE only NOT IN only IN and NOT IN IN only LIKE only NOT IN only IN and NOT IN IN only ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Count function in SQL returns the number of values. groups. distinct values. columns. values. groups. distinct values. columns. ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which of the following SQL commands is used to retrieve data? DELETE INSERT JOIN SELECT DELETE INSERT JOIN SELECT ANSWER DOWNLOAD EXAMIANS APP
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