使用bash脚本从在线数据库下载文件

I want to download some files from an online database, but it does not allow me to download all the files at once. Instead it offers to download a file for a searched keyword. Because I have more than 20000 keywords, it's not feasible for me. For example, I want to download whole information about miRNA-mRNA interaction from I want to download some files from an online da