My date columns are imported as a string column. How do I resolve this?

My date columns are imported as a string column. How do I resolve this?

Do ensure that the column type is set as DATE, DATETIME or equivalent types in the source table. In case your column type is set as string or similar types, then your data column may get imported as a string column. In this case you can convert it into date data type while importing using the Custom Query option.