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Urgent, help you how to use SQL to calculate the latest date flow per hour

Time:03-21

Hours of the first column is the date of the second quarter, the third train traffic, date will be constantly updated, hours will be update in time, how to display an hour traffic,

CodePudding user response:

The total field values, such as increasing by the hour after traffic accumulative total value? If yes, why after an hour of total less than an hour before, such as less than 13, 14