这是我的数据集:
00000000040112 2702 00000000040112 AVAILABLE 1566921227223 -6.0 LB
00000000040112 2702 00000000040112 AVAILABLE 1566921247222 -9.0 LB
00030400791888 6065 00030400791888 AVAILABLE 1566919357992 45.0 EA
00030400791888 6065 00030400791888 AVAILABLE 1566919547809 72.0 EA
我正在尝试从每个组中获取最大值,因此根据上述数据,预期结果将是这样的:
00000000040112 2702 00000000040112 AVAILABLE 1566921247222 -9.0 LB
00030400791888 6065 00030400791888 AVAILABLE 1566919547809 72.0 EA
我无法产生正确结果的查询是:
select
primegtin, nodeid, gtin, inventory_state,
max(last_updated_time),
quantity_by_gtin, quantity_uom
from pit_by_prime_gtin
where
year=2019 and month =8 and day =27 and hour=15
group by
primegtin, nodeid, gtin, inventory_state,
last_updated_time,
quantity_by_gtin, quantity_uom ;
这可能是什么问题?
答案 0 :(得分:0)
您需要删除通过group by
子句进行汇总的列。
在您的示例中,它可能应该类似于:
select
primegtin, nodeid, gtin, inventory_state,
max(last_updated_time),
max(quantity_by_gtin), quantity_uom
from pit_by_prime_gtin
where
year=2019 and month =8 and day =27 and hour=15
group by
primegtin, nodeid, gtin, inventory_state,
quantity_uom ;