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0 1 I am working on a DataFrame looks as follows: ------------------------------- | time | value | ------------------------------- | 2014-12-01 02:54:00 | 2 | | 2014-12-01 03:54:00 | 3 | | 2014-12-01 04:54:00 | 4 | | 2014-12-01 05:54:00 | 5 | | 2014-12-02 02:54:00 | 6 | | 2014-12-02 02:54:00 | 7 | | 2014-12-03 02:54:00 | 8 | ------------------------------- the number of samples on each day is pretty random. I want to get just one sample on each day, such as: ------------------------------- | time | value | ------------------------------- | 2014-12-01 02:54:00 | 2 | | 2014-12-02 02:54:00 | 6 | | 2014-12-03 02:54:00 | 8 | ------------------------------- I don't care about which sample I get from one day, but I want to make sure to get one so there is no day duplication on "time" column. apache-spark apache-zeppelin share | improve this question edited Nov 13 '18 at 18:44 Psidom 124k 12 86 128 asked Nov 13 '18 at 18:41 B

Double-A baseball game in action: New Hampshire Fisher Cats Double-A (or Class AA ) is the second highest level of play in Minor League Baseball (MiLB) in the United States after Triple-A. There are thirty Double-A teams in three leagues at this classification: Eastern League, Southern League, and the Texas League. [1] The modern Double-A classification was created in 1946 with the renaming of Class A1 , which then contained the Texas League and the Southern Association. After the Southern Association disbanded in 1961, the Eastern League and the original South Atlantic "Sally" League were bumped up to Double-A in the 1963 minor league reorganization. The SAL changed its name to the Southern League in 1964. Contents 1 System 2 Current teams 2.1 Eastern League 2.2 Southern League 2.3 Texas League 3 Playoffs 4 Awards 5 Pace-of-play initiatives 6 References 7 External links System The Double-A classification usually hosts developing players that have been part of pr