一、正常的SQL
SELECT id, name, age from student;
二、查询出的结果展示前修改为同一类值
SELECT id, 'xuesheng' as name ,age FROM student;
三、列名别名
SELECT id as "SID", name, age FROM student;
一、正常的SQL
SELECT id, name, age from student;
二、查询出的结果展示前修改为同一类值
SELECT id, 'xuesheng' as name ,age FROM student;
三、列名别名
SELECT id as "SID", name, age FROM student;