Introduction to SQL What operator tests column for the absence of data? EXISTS operator IS NULL operator None of these NOT operator EXISTS operator IS NULL operator None of these NOT operator ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The benefits of a standard relational language include which of the following? Applications are not needed Reduced training costs Increased dependence on a single vendor All of these Applications are not needed Reduced training costs Increased dependence on a single vendor All of these 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 Which command undo all the updates performed by the SQL in the transaction? COMMIT TRUNCATE ROLLBACK DELETE COMMIT TRUNCATE ROLLBACK DELETE ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Find the name of all cities with their temperature, humidity and countries. SELECT weather.city, temperature, humidity FROM weather SELECT country FROM location WHERE weather.city = location.city; SELECT weather.city, temperature, humidity, country FROM weather, location WHERE weather.city = location.city; SELECT weather.city, temperature, humidity, country FROM weather, location; SELECT city, temperature, humidity, country FROM location; SELECT weather.city, temperature, humidity FROM weather SELECT country FROM location WHERE weather.city = location.city; SELECT weather.city, temperature, humidity, country FROM weather, location WHERE weather.city = location.city; SELECT weather.city, temperature, humidity, country FROM weather, location; SELECT city, temperature, humidity, country FROM location; ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL SQL is: an operating system. a data sublanguage. a programming language. a DBMS. an operating system. a data sublanguage. a programming language. a DBMS. ANSWER DOWNLOAD EXAMIANS APP
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