Systems and Methods for Preparing Raw Data for use in Data Visualizations

Systems and methods for preparing raw data for use in data visualizations are described herein. A method includes selecting a sample of data values from an existing data column in a data source, identifying a first delimiting location within the sample, creating first and second new data values by splitting each data value in the existing data column at the first identified delimiting location, storing the first and second new data values in first and second new data columns, respectively, and assigning field names to the first and second new data columns. The method also includes displaying a schema information region, which includes the assigned field names, in a data visualization user interface. The method displays a data visualization that includes first and/or second new data values based on user selection of the assigned field names of the first or second new data columns.