Hive踩过的坑-hive having count 不能去重

hive在group by xx having count()是不支持去重计数的。

不信的话，你们可以试下类似的代码?

SELECT IMEI,IP,FT,LT,CASE WHEN FT = LT THEN 1 ELSE 0 END IS_O_DAY
FROM temp_gz23g_IP_1878910_2 b
WHERE b.IP IN ( 
SELECT a.IP FROM temp_gz23g_IP_1878910_2 a WHERE a.IP !=''
GROUP BY a.IP HAVING COUNT(DISTINCT a.IMEI) = 1)

然后在hive执行的话，会报错：Error: Error while compiling statement: FAILED: SemanticException Line 6:36 Invalid column reference 'IMEI' in definition of SubQuery sq_1

如果想执行的话，那就在里面套一层：

SELECT IMEI,ip,FT,LT,CASE WHEN FT = LT THEN 1 ELSE 0 END IS_O_DAY
FROM temp_gz23g_IP_1878910_2
WHERE ip IN( 
SELECT ip FROM(
SELECT ip,COUNT(DISTINCT IMEI) d_imei_num FROM temp_gz23g_IP_1878910_2
WHERE ip !='' GROUP BY ip)a where d_imei_num=1)

好了.记录完毕..