PPT Slide
SELECT empid, lastname, firstname, NVL(spouse,'unmarried') FROM HRAPP.EMP;
Now the result of this SELECT statement
EMPID LASTNAME FIRSTNAME SPOUSE--------- ------------ ------------- -----------39334 SMITH GINA FRED 49539 QIAN LEE unmarried
60403 HARPER ROD SUSAN 02039 WALLA RAJENDRA HARPREET 49392 SPANKY STACY unmarried