Starting from version 5.16 columns may be referred not only by index (e.g. A,D-E) but also by name (e.g. "Begin", "Employee"). In general references are delimited by comma or semicolon. Mixtures are allowed too (e.g. A,B,"Employee").
Letters and letter combination represent a number. A correspond with 1, B with 2, and so forth. AA corresponds with 27, AB with 28 and so forth. Ranges maybe specified using a dash (e.g. A-C).
Names must be set into double quote. Names are case-sensitive. Double quotes in a name must be escaped with backslash. Ranges of columns by name are not allowed.