Introduction to SQL SELECT DISTINCT is used if a user wishes to see duplicate columns in a query. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL ORDER BY can be combined with the SELECT statements. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which of the following is illegal? 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; None of these SELECT SYSDATE - (SYSDATE + 2) FROM DUAL; ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL A SELECT statement within another SELECT statement and enclosed in square brackets ([...]) is called a subquery. False True False True 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
Introduction to SQL Most companies keep at least two versions of any database they are using. True False True False ANSWER DOWNLOAD EXAMIANS APP
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