Introduction to SQL SELECT DISTINCT is used if a user wishes to see duplicate columns in a query. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which of the following group functions ignore NULL values? MAX All of these SUM COUNT MAX All of these SUM COUNT ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Indexes may be created or dropped at any time. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The SQL keyword GROUP BY instructs the DBMS to group together those rows that have the same value in a column. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which of the following SQL query is correct for selecting the name of staffs from 'staffinfo' table where salary is 10,000 or 25,000? Both A and B SELECT name FROM staffinfo WHERE salary IN (10000, 25000); None of these SELECT name FROM staffinfo WHERE salary BETWEEN 10000 AND 25000; Both A and B SELECT name FROM staffinfo WHERE salary IN (10000, 25000); None of these SELECT name FROM staffinfo WHERE salary BETWEEN 10000 AND 25000; 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
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