MySQL how to remove prefix/suffix e.g. leading/trailing quotes from a column of strings

update table set column = trim(BOTH '"' FROM column);

For example, above removes the leading and trailing (prefix/suffic) quotes that excel adds upon csv export.

You could Select records with a prefix that was a quote (“) this way:

SELECT * FROM table WHERE column like '"%'

or a suffix quote (“) this way:

SELECT * FROM table WHERE column like ‘%”‘