Every column within each dataset you import is of a specific type. The data types (or column types) can be found in the data view of your datasets. Each column can fall into one of these categories:
Distinguishing between your column types is important as every type has its own SQL query. Certain column types also have their own limitations when it comes to layer styling — for example, styling your map layer using our range styling requires number columns. To change a column’s type you must do the following:
Click the OPTIONS button next to your dataset and select VIEW DATASET from the dropdown menu.
Click the arrow next to the data type. A dropdown menu will appear; select the data type you'd like to change your column to. Confirm your changes.