使用串接操作符* SQL> SELECTtename||job AS \"Employees\" 2 FROM temp; Employees ---- KINGPRESIDENT BLAKEMANAGER CLARKMANAGER JONESMANAGER MARTINSALESMAN ALLENSALESMAN ... 14 rows selected. * SELECTtename||job AS \"Employees\" FROM temp; 在这个示例中,ENAME和JOB被串接在一起,并且赋予了别名Employees。注意,员工号和职位被合并成一个输出列。AS关键字在别名前使SELECT子句更易读。