如何在 sql 的组语句中显示小数位

Question

SELECT DISTINCT date,

       type,

       id,

       process,

       PERCENTILE_DISC(0.90) within group(ORDER BY duration/60000) OVER (PARTITION BY date,type,id,process) AS top90

FROM table

It returned like follow.

date       id    type  process top90
2021-05-19  a      X    A       6
2021-05-19  b      Y            
2021-05-19  c      Z    A       7

But my desired result is like following to display up to 2 decimal places.

date       id    type  process top90
2021-05-19  a      X    A       6.36
2021-05-19  b      Y            
2021-05-19  c      Z    A       7.42

I tried cast(duration/60000,real) but it returned same result..

If someone has opinion, please let me know.

Thanks

Answer 1

1. If duration is an integer or bigint , duration / 60000 will be an integer division and truncate the result.

   Use duration / 60000.0 to avoid that.

2. percentile_disc will return the existing value closest to the specified percentile. Use percentile_cont to interpolate.