保留两位小数

T1.MONTH_KEY,round(T1.KPI1,2)

T1：表别名

MONTH_KEY：列名

2：精确位数

eg:

SELECT
T1.CITY_KEY，
T2.CITY_ZHNAME，
T1.MONTH_KEY,round(T1.KPI1,2),round(T1.KPI2,2),round(T1.KPI3,2),round(T1.KPI4,2),round(T1.KPI5,2),round(T1.KPI6,2),round(T1.KPI7,2)
FROM
npm_ads.A_FT_TRANS_HEALTH_MN T1,npm_ads.DW_DM_CO_CITY T2
WHERE 1=1
AND T1.CITY_KEY=T2.CITY_KEY