I need to add a new column in core_members tables.

In the developer center I only find create new table.

thanks in advance

You have to add manual query in Versions.

Don't forget, though... If you're adding a column to another table, you have to also REMOVE that column with an uninstall extension.

We strongly encourage you NOT to add columns to native tables. It is generally better practice to create your own table to track things for your own application or plugin.