A single string columned table which is also the PK OR create an integer auto increment column as its PK and then set the string column as an UNIQUE field?
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A single string columned table which is also the PK OR create an integer auto increment column as its PK and then set the string column as an UNIQUE field?
That depends on what you want to achieve.
If you want a stable database schema which you can change later, always add ID columns and use those as primary keys.
If maintenance is not necessary or not wanted, you can use the strings as keys and waste countless hours later when one of those “immutable” keys must be changed to update it everywhere.