Introduction to SQL Which of the following group functions ignore NULL values? SUM MAX All of these COUNT SUM MAX All of these COUNT 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 The SQL statement: SELECT Name, COUNT(*) FROM NAME_TABLE; counts the number of name rows and displays this total in a table with a single row and a single column. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The benefits of a standard relational language include which of the following? All of these Increased dependence on a single vendor Applications are not needed Reduced training costs All of these Increased dependence on a single vendor Applications are not needed Reduced training costs ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL What operator tests column for the absence of data? NOT operator IS NULL operator None of these EXISTS operator NOT operator IS NULL operator None of these EXISTS operator ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL COUNT(field_name) tallies only those rows that contain a value; it ignores all null values. True False True False ANSWER DOWNLOAD EXAMIANS APP
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