select CASE
WHEN (shipment_date >=((to_char(shipment_date, 'dd-Mon-yyyy 08:00')::timestamp)) and shipment_date < ((to_char(shipment_date, 'dd-Mon-yyyy 20:00')::timestamp )))
THEN to_char(shipment_date, 'dd/MM/yyyy 08:00')
WHEN (shipment_date >=((to_char(shipment_date, 'dd-Mon-yyyy 20:00')::timestamp)) and shipment_date < ((to_char(shipment_date + interval '1' day, 'dd-Mon-yyyy 08:00')::timestamp )))
THEN to_char(shipment_date, 'dd/MM/yyyy 20:00')
END as shipment_date_sort,
COUNT(lotnumber)
from shipping.picklist_lots
inner join shipping.picklist on picklist_lots.picklist_id = picklist.picklist_id
where shipment_date >= '12/23/2014' and shipment_date < '12/24/2014'
GROUP BY shipment_date_sort
它没有给我的结果是24/12/2014 00:00到24/12/2014 08:00之间的发货日期
我需要它
答案 0 :(得分：0)
where shipment_date >= '12/23/2014' and shipment_date < '12/24/2014'
添加时间值。根据您的日期时间值，24/12/2014 00:00，它应该是格式（年/月/日00:00）
where shipment_date >= '23/12/2014' and shipment_date <= '24/12/2014 23:59'
答案 1 :(得分：0)
根据逻辑查询处理，您不能在分组中使用SELECT语句的别名，因为SELECT在GROUP BY之后发生，因此您需要将CASE语句复制到你的GROUP BY部分。