如何在Php中创建表列字段多文件附件

I have Form using php. in this Form i have Field .Select Main Category,subcategory,Description,Subject, last one attachment Field. how to create attachment column store multiple attachment like picture and video what ever we upload its store database

already i created Post category table following fields

Main category  varchar(50),

Sub category  varchar(50),

SubjectName varchar(50),

Description varchar(50),

last field Attachement how to create column Field to store database multiple attachment