Introduction to SQL What operator tests column for the absence of data? NOT operator EXISTS operator None of these IS NULL operator NOT operator EXISTS operator None of these IS NULL operator 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 Find all the tuples having temperature greater than 'Paris'. SELECT * FROM weather WHERE temperature > 'Paris' temperature SELECT * FROM weather WHERE temperature > (SELECT temperature FROM weather WHERE city = 'Paris') SELECT * FROM weather WHERE temperature > (SELECT * FROM weather WHERE city = 'Paris') SELECT * FROM weather WHERE temperature > (SELECT city FROM weather WHERE city = 'Paris') SELECT * FROM weather WHERE temperature > 'Paris' temperature SELECT * FROM weather WHERE temperature > (SELECT temperature FROM weather WHERE city = 'Paris') SELECT * FROM weather WHERE temperature > (SELECT * FROM weather WHERE city = 'Paris') SELECT * FROM weather WHERE temperature > (SELECT city FROM weather WHERE city = 'Paris') ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The wildcard asterisk (*) is the SQL-92 standard for indicating "any sequence of characters." False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which of the SQL statements is correct? SELECT Username, Password FROM Users SELECT Username AND Password FROM Users SELECT Username, Password WHERE Username = 'user1' None of these SELECT Username, Password FROM Users SELECT Username AND Password FROM Users SELECT Username, Password WHERE Username = 'user1' None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which command undo all the updates performed by the SQL in the transaction? COMMIT ROLLBACK TRUNCATE DELETE COMMIT ROLLBACK TRUNCATE DELETE ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS