我正在寻找基于3种不同条件(DB2数据库)的项目计数。我需要统计所有项目< = .10,> = .5和> = 1.00(percentage_used),但只能按dim_building_id和building_name进行分组。当然,这个查询将不会运行,因为它需要percentage_used被添加到组中。如何处理percentage_used这3个条件?Count,Having和Case语句
SELECT
SUM(CAST(FTS.GROUP_A AS BIGINT)) AS GROUP_A,
SUM(CAST(FTS.GROUP_B AS BIGINT)) AS GROUP_B,
SUM(CAST(FTS.GROUP_C AS BIGINT)) AS GROUP_C,
CASE WHEN FAT.PERCENTAGE_USED <= '0.10'
THEN COUNT(*)
END AS PROJECTS_L10,
CASE WHEN FAT.PERCENTAGE_USED >= '0.50'
THEN COUNT(*)
END AS PROJECTS_G50,
CASE WHEN FAT.PERCENTAGE_USED >= '1.00'
THEN COUNT(*)
END AS PROJECTS_G100,
DAYS(DATE('2014-07-01')) - DAYS(CURRENT DATE) AS DAYS_LEFT,
(DAYS(DATE('2014-07-01')) - DAYS(CURRENT DATE))/7 AS WEEKS_LEFT,
DAYS(DATE('2013-12-31')) - DAYS(CURRENT DATE) AS DAYS_LEFT_YEAR
FROM FACT_TABLE AS FAT
INNER JOIN GROUPS AS FTS ON FAT.DIM_PROJECT_ID = FTS.DIM_PROJECT_ID
GROUP BY FAT.DIM_BUILDING_ID, FAT.BUILDING_NAME;
好的想法在范围内添加,但基于问题中的值没有指示范围是理想的。 –