Introduction to SQL Which of the following query finds the names of the sailors who have reserved at least one boat? SELECT DISTINCT s.sname FROM sailors, reserves WHERE s.sid = r.sid; SELECT s.sname FROM sailors s, reserves r WHERE s.sid = r.sid; None of These SELECT DISTINCT s.sname FROM sailors s, reserves r WHERE s.sid = r.sid; SELECT DISTINCT s.sname FROM sailors, reserves WHERE s.sid = r.sid; SELECT s.sname FROM sailors s, reserves r WHERE s.sid = r.sid; None of These SELECT DISTINCT s.sname FROM sailors s, reserves r WHERE s.sid = r.sid; ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which of the following is a SQL aggregate function? JOIN LEFT AVG LEN JOIN LEFT AVG LEN ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The keyword BETWEEN can be used in a WHERE clause to refer to a range of values. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Scalar aggregate are multiple values returned from an SQL query that includes an aggregate function. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which of the following is illegal? None of these SELECT SYSDATE - (SYSDATE - 2) FROM DUAL; SELECT SYSDATE - SYSDATE FROM DUAL; SELECT SYSDATE - (SYSDATE + 2) FROM DUAL; None of these SELECT SYSDATE - (SYSDATE - 2) FROM DUAL; SELECT SYSDATE - SYSDATE FROM DUAL; SELECT SYSDATE - (SYSDATE + 2) FROM DUAL; ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL ON UPDATE CASCADE ensures which of the following? All of these Normalization Materialized Views Data Integrity All of these Normalization Materialized Views Data Integrity ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS