This UPDATE statement uses a SET clause in which a list of column names is set equal to a list of expressions or to a SELECT statement. The number of columns on the left of the equal sign is not the same as the number of data values produced on the right. Roll back the current transaction. Then rewrite this statement. If a list of expressions is used, check the punctuation to ensure that each expression is distinct. If a SELECT statement is used, review it to see how many columns it returns.