Index - J
| join | DataFrame.Operations.Join, DataFrame |
| jointBincount | DataFrame.Internal.Statistics |
| JoinType | DataFrame.Operations.Join, DataFrame |
| JSON_TYPE | DataFrame.IO.Parquet.Types |
| julianDayAndNanosToUTCTime | DataFrame.IO.Parquet.Time |
| julianDayToDay | DataFrame.IO.Parquet.Time |