text: /*
  The SELECT DISTINCT statement is used to return only distinct (different) values.
  */
  
  SELECT DISTINCT JOB_ID FROM EMPLOYEES;
  
  /*
  
  JOB_ID    
  ----------
  AC_ACCOUNT
  AC_MGR
  AD_ASST
  AD_PRES
  AD_VP
  FI_ACCOUNT
  FI_MGR
  HR_REP
  IT_PROG
  MK_MAN
  MK_REP
  
  JOB_ID    
  ----------
  PR_REP
  PU_CLERK
  PU_MAN
  SA_MAN
  SA_REP
  SH_CLERK
  ST_CLERK
  ST_MAN
  
  19 rows selected. 
  
  */
  
  