Using Update Querry To Change A Text Character

I have a database that I imported as a comma deliminated csv file. To keep my original text comas intact I changed all the commas to semicolons before I created the csv file and imported the data. I now have a data base with semicolons in place of the original commas.

I am trying to use the update query function to change all the semicolons back to commas in one of the database fields called File_name


I have a data entry where a record in the File_name field looks like this for example

Chevrolet cavalier; red

and I want to change it so that it looks like

Chevrolet cavalier, red


I run an update query with the criteria set as Like "*;*"


and this finds all the records which have a semicolon in them

I have set the update field to "*,*"


but all this does is to change the record from


Chevrolet cavalier; red

to

*,*


Is the query update the way to go and what is the syntax that I should be using in the Update field just to change the semicolon to a comma and leave the other text intact?


thanks Mark