Ambil hanya Baris terendah dari duplikat [duplikat]

Question

Di sini saya memiliki tabel yang berisi data seperti ini:

   Location    No   Days
   ----------------------
      Callao    1    7
      Callao    2    7
      CHENNAI   3    6
      SINGAPORE 4   30
      SINGAPORE 5    7
      SINGAPORE 6    7
    LOS ANGELES 7    9
   HONG KONG    7   11
   HONG KONG    7    6
 LOS ANGELES    8    6
   HONG KONG    9    6
   HONG KONG    9    4
 LOS ANGELES    9   10
 LOS ANGELES    9    9
 LOS ANGELES    10   6

Di sini sekarang saya hanya ingin baris yang memiliki angka dengan hari terendah:

Saya ingin seperti ini,

   Location    No   Days
   ---------------------
      Callao    1    7
      Callao    2    7
     CHENNAI    3    6
    SINGAPORE   4   30
   SINGAPORE    5    7
   SINGAPORE    6    7
   HONG KONG    7    6
 LOS ANGELES    8    6
   HONG KONG    9    4
 LOS ANGELES    10   6

Saya hanya ingin menghapus duplikasi No. berdasarkan nilai tertinggi, saya sudah mencoba banyak sendiri tetapi tidak ada yang berhasil.

Bantu saya menyelesaikan ini, terima kasih sebelumnya.

Answer 1

WITH
-- your input, thanks for pasting it in ..
indata(location,no,days) AS (
          SELECT 'Callao',1,7
UNION ALL SELECT 'Callao',2,7
UNION ALL SELECT 'CHENNAI',3,6
UNION ALL SELECT 'SINGAPORE',4,30
UNION ALL SELECT 'SINGAPORE',5,7
UNION ALL SELECT 'SINGAPORE',6,7
UNION ALL SELECT 'LOS ANGELES',7,9
UNION ALL SELECT 'HONG KONG',7,11
UNION ALL SELECT 'HONG KONG',7,6
UNION ALL SELECT 'LOS ANGELES',8,6
UNION ALL SELECT 'HONG KONG',9,6
UNION ALL SELECT 'HONG KONG',9,4
UNION ALL SELECT 'LOS ANGELES',9,10
UNION ALL SELECT 'LOS ANGELES',9,9
UNION ALL SELECT 'LOS ANGELES',10,6
)
-- real query starts here, replace "," with "WITH" ..
,
w_filter AS (
  SELECT
    *
  , ROW_NUMBER() OVER(PARTITION BY no ORDER BY days) AS fil
  FROM indata
)
SELECT
  location
, no
, days
FROM w_filter
WHERE fil=1
ORDER BY 2 ;
-- out   location   | no | days 
-- out -------------+----+------
-- out  Callao      |  1 |    7
-- out  Callao      |  2 |    7
-- out  CHENNAI     |  3 |    6
-- out  SINGAPORE   |  4 |   30
-- out  SINGAPORE   |  5 |    7
-- out  SINGAPORE   |  6 |    7
-- out  HONG KONG   |  7 |    6
-- out  LOS ANGELES |  8 |    6
-- out  HONG KONG   |  9 |    4
-- out  LOS ANGELES | 10 |    6