Re: How to recognize and get the min of a date/string column in Java?

2022-06-15 Thread marc nicole
finally solved with the MM for months format recommendation. thanks Le mar. 14 juin 2022 à 23:02, marc nicole a écrit : > i changed the format to -mm-dd for the example > > Le mar. 14 juin 2022 à 22:52, Sean Owen a écrit : > >> Look at your data - doesn't match date format you give >> >>

Re: How to recognize and get the min of a date/string column in Java?

2022-06-14 Thread marc nicole
i changed the format to -mm-dd for the example Le mar. 14 juin 2022 à 22:52, Sean Owen a écrit : > Look at your data - doesn't match date format you give > > On Tue, Jun 14, 2022, 3:41 PM marc nicole wrote: > >> for the input (I changed the format) : >> >> +---+ >> |Date

Re: How to recognize and get the min of a date/string column in Java?

2022-06-14 Thread Sean Owen
Look at your data - doesn't match date format you give On Tue, Jun 14, 2022, 3:41 PM marc nicole wrote: > for the input (I changed the format) : > > +---+ > |Date| > +---+ > | 2019-02-08 | > ++ > | 2019-02-07 | > ++ > |

Re: How to recognize and get the min of a date/string column in Java?

2022-06-14 Thread marc nicole
for the input (I changed the format) : +---+ |Date| +---+ | 2019-02-08 | ++ | 2019-02-07 | ++ | 2019-12-01 | ++ | 2015-02-02 | ++ | 2012-02-03 | ++ | 2018-05-06 |

Re: How to recognize and get the min of a date/string column in Java?

2022-06-14 Thread marc nicole
Hi Sean, Even with MM for months it gives incorrect (but different this time) min value. Le mar. 14 juin 2022 à 20:18, Sean Owen a écrit : > Yes that is right. It has to be parsed as a date to correctly reason about > ordering. Otherwise you are finding the minimum string alphabetically. > >

Re: How to recognize and get the min of a date/string column in Java?

2022-06-14 Thread Sean Owen
Yes that is right. It has to be parsed as a date to correctly reason about ordering. Otherwise you are finding the minimum string alphabetically. Small note, MM is month. mm is minute. You have to fix that for this to work. These are Java format strings. On Tue, Jun 14, 2022, 12:32 PM marc

How to recognize and get the min of a date/string column in Java?

2022-06-14 Thread marc nicole
Hi, I want to identify a column of dates as such, the column has formatted strings in the likes of: "06-14-2022" (the format being mm-dd-) and get the minimum of those dates. I tried in Java as follows: if (dataset.filter(org.apache.spark.sql.functions.to_date( > dataset.col(colName),