Re: group by: need a Timestamp in a group by statement?
Thank you Sunny and Kushal, both are valid ways, the resident and the preceding load. My topic is that,my original table (including the time_stamp) with the group (without the time_stamp) is working fine as well, although I ignored the rule to put the time_stamp in the group by statement .
So is this a valid way, or should I better stick to the resident or preceding load which you have presented? A small explanation would be great, thx a lot.