Trying to do work that was previously done in ArcGIS. There is a table when filling 4 columns, these values are added in the Sum column.
In QGIS, I decided to use the Value Map for fields
For the Sum field, I use the following expression
But as a result, I lose zeros
before number
Where did I go wrong and how do I get values with zeros when field type is real and SUM field is string?
lpad("FILL",2,'0')
.