What are SQLDataType Property and SqlTimeStamp Properties used for?

What are SQLDataType Property and SqlTimeStamp Properties used for?
SQL Data Type applies to Code fields. It basically control how the data is treated, so it will also affect the sorting and display. Normally, you don't need to change this.
docs.microsoft.com/.../devenv-sqldatatype-property
SQL Time Stamp is to specify that the field will be used as the time stamp for the table.