Hi Clarence Tan
You can convert measures from discrete to continuous or from continuous to discrete. Click the field and chooseDiscrete or Continuous. The field is green when it is continuous, and blue when it is discrete.
For measures in the Data pane, right-click the field and choose Convert to Discrete or Convert to Continuous. The color of the field changes accordingly.
Convert date fields
You can convert Date fields between discrete and continuous. Click any Date field in the view and choose one of the options on the context menu to change it from discrete to continuous or from continuous to discrete:
To convert a Date field in the Data pane (and thus to determine the default result when you drag it into a view), right-click the field and choose Convert to Discrete or Convert to Continuous.
The first date option is descrete and below is the continous date option. Please refer below link to understand the difference between descreate and continous.