I'm new to HeidiSQL and can't seem to find a manual. How can I make a field unique from inside the client? I see this post here describing the SQL statement that I need. Is there a way to do this in the client with a check mark or something? Is it also possible to call a SQL statement from within HeidiSQL that would accomplish my goal?
Click on the table you want to alter. There is a tab called "Indexes" there. Add a new index. Add the column you want to make unique to this index. Under "Type / Length", select UNIQUE. Then save.