Issue a SELECT statement that displays NEXTVAL for MY_FIRST_SEQ three times. Because the value isn’t being placed in a table, use the DUAL table in the FROM clause of the SELECT statement. What causes the error on the third SELECT?

Some responsibilities of having a checking account : write checks clearly and carefully.  keep an accurate record of checks written, so you can keep track of payments & deposits made to cover the check. maintain checks register with accuracy so as to avoid returned checks.

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All of the above are true.