The stores table has a column START_DATE of data type DATE, containing the date the row was inserted. You only want to display details of rows where START_DATE is within the last 25 months. Which where clause can be used?
A. WHERE MONTHS_BETWEEN(SYSDATE, start_date) <=25
B. WHERE ADD_MONTHS(start_date, 25) <= SYSDATE
C. WHERE TO_NUMBER(start date - SYSDATE) <= 25
D. WHERE MONTHS_BETWEEN(start_date, SYSDATE) <= 25
Which statement is true about database links?
A. Private database link creation requires the same user to exist in both the local and the remote databases.
B. A public database link can be created only by SYS.
C. A database link can be created only between two Oracle databases.
D. A public database link can be used by a user connected to the local database instance to connect to any schema in the remote database instance.
E. A database link created in a database allows a connection from that database's instance to the target database's Instance, but not vice versa.
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