The Excel formula `I_SQL_SELECT_SCALAR` composes and executes a SQL select statement, returning the single column, single row result. Parameters: - `fieldName`: the name of the column to select. - `tableName`: the name of the table. - `whereClause`: the where clause for the statement. - `orderByClause`: the order instructions. - `postFix`: postfix for the statement. - `valueNoValue`: value to return when no row was retrieved. - `valueToomanyValues`: value to return when more than one row was retrieved. - `process`: Excel boolean indicating whether to actually execute the statement. Returns: the single column, single row result when made available.