1. 5      SELECT          A.*,  
    2.                    列名,  
    3.                    表达式 
    4. 1      FROM                 A 
    5. 2      WHERE        A.ENAME = 'UZI'
    6. 3      GROUP BY     A.NUM 
    7. 4      HAVING       A.SAL > 2200
    8. 6      ORDER BY     A.HIREDATE [ASC/DESC]