删除重复项

Question

显示出来时,是否可以只删除表格中的一列？

company name ||  name || year||
____________________________________
walmart      || jason || 1990
___________________________________
walmart      || mary  || 2000

至

company name ||  name || year||
____________________________________
walmart      || jason || 1990
___________________________________
             || mary  || 2000
____________________________________

数据从数据库中检索.

Answer 1

你必须在客户端这样做.
类似于
CurrentValue == PreviousValue写空字符串.