Work at ordinary times, pbg1 corresponding data of the red box is adjustable, not allowed to change; Pbg3 is adjustable, but can modify, pbg4 corresponding text box, need from the database query, corresponding query condition is pbg1 and pbg2 maximum + 1, then can according to the change of pbg3 find out corresponding to the maximum, can also be manually modify pbg4 numerical,

Thank god for help

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