为什么我的 SQL 查询不适用于我的 where not equal 条件？

Question

I used a CTE (temp table) to compute data through semesters. With my query, I want to compare if my data (already aggregated) are equal to my sum computed in my CTE. However, when using WHERE data_already_aggregated <> data_computed I got a result where my results in those columns are equal. I tried to use =! as well, and also =. Last option worked, but not the way I want.

Here my code:

WITH trimestriel AS(
SELECT "donnéestrim".annee,
       "donnéestrim".trimestre,
       "donnéestrim".codescpi,
       scpi.scpi,
       "donnéestrim"."rd_t",
       SUM("donnéestrim".rd_t) OVER (PARTITION BY "donnéestrim".annee, "donnéestrim".codescpi) AS "trim_sum_totalYear_rd_t",
       row_number() over (partition BY scpi.codescpi, annee) AS "row_number"
FROM "donnéestrim"
LEFT JOIN scpi ON scpi.codescpi = "donnéestrim".codescpi
ORDER BY "donnéestrim".annee)

SELECT "annuel".codescpi,
       scpi.scpi ,
       "annuel".annee,
       trimestriel."trimestre",
       "annuel".revdisavpl AS "annuel_revdisavpl",
       "trim_sum_totalYear_rd_t",
       "rd_t" AS "trim_rd_t"
FROM "annuel"
LEFT JOIN scpi ON scpi.codescpi = "annuel".codescpi
LEFT JOIN trimestriel ON trimestriel.codescpi = "annuel".codescpi AND trimestriel.annee=annuel.annee
WHERE    "annuel".annee = '2018' and scpi.codescpi = '129' and "annuel".revdisavpl != "trim_sum_totalYear_rd_t"

result

Answer 1

As @JNevill suggested, it's a data type problem. A double precision type only display the data with its specific parameters, but can store more information if casted. I cast it to real, and I can saw the gaps between my data.