如何通过为所有条目添加自定义名称来更新所有记录

Question

I have facing a problem. I want to update all my database field value by adding a custom name at the beginning of the row. Here is an example.

In the above picture i want to add a folder name image at the beginning of each record in the table. But I am unable to do it. Sorry for my bad English.

Answer 1

It sounds like you just want this update:

UPDATE yourTable
SET image_large = CONCAT('image/', image_large);

But if I get a vote, then I suggest that you just add this prefix in your presentation layer.

Answer 2

Call a UPDATE like this (simplified)

UPDATE table SET field1 = concat('image/', field1);

Backup your data before. And be aware without a WHERE clause it will update every row!