用Underscore MySQL替换列名中的空格

Question

I have inherited a MySQL database that contains many columns in many tables that have spaces in their names. I have been asked to change all spaces in column names to underscores. Is there a way to do this with a script?

I thought that I can get them all listed with a SELECT from information_schema.... but I am not sure how to I can do the replacement.

My logic would be that if the column name contains a space, replace it with an underscore. But I am not sure how to do that.

Answer 1

if you have the privileges, you would do the following:

UPDATE COLUMNS SET COLUMN_NAME = REPLACE(COLUMN_NAME, ' ', '_')

But most likely, you cant alter the schema.

Answer 2

update information_schema.TABLES a
        join
    information_schema.COLUMNS b ON a.TABLE_Schema = b.TABLE_SCHEMA 
set 
    b.COLUMN_NAME = REPLACE(b.COLUMN_NAME, ' ', '_')
where
    a.TABLE_SCHEMA = 'YOURDBNAME'; 

Raheel Hasan's should be the right answer if you have the privileges for information_schema database.