I'm searching for syntax in calculated field area (meta web or QBE). I'd like to extract year or month from a date, concatenate 2 strings and other classic data transformations. I work with MySQL and tried MySQL expressions improved with Workbench, but I've an error message each time. I tried to use predefined transformation proposed with buttons like <AA< or others, with or without brackets. Each time I have the error message : No columns using the name [] are found in the expression of Calculated Field.