Columns will support a concept of values being optional or required. E.g. a non-optional number column supports only numeric values, while an optional number column also supports an "empty" state separate from the value of zero.
Most column types will support becoming optional. Some may not support this.
Columns will support a concept of values being optional or required. E.g. a non-optional number column supports only numeric values, while an optional number column also supports an "empty" state separate from the value of zero.
Most column types will support becoming optional. Some may not support this.