SELECT `FEVR$`.hospvid, Count(`FEVR$`.Medicament) , `FEVR$`.Valideur, 'Février' FROM `E:\chemin\tcd caline.xls`.`FEVR$` `FEVR$` GROUP BY `FEVR$`.hospvid, `FEVR$`.Valideur, 'Février' union SELECT`MARS$`.hospvid , count(`MARS$`.Medicament), `MARS$`.Valideur, 'Mars' FROM `E:\chemin\tcd caline.xls`.`MARS$` `MARS$` GROUP BY `MARS$`.hospvid, `MARS$`.Medicament, `MARS$`.Valideur, 'Mars' union SELECT `AVR$`.hospvid, Count(`AVR$`.Medicament) , `AVR$`.Valideur, 'Avril' FROM `E:\chemin\tcd caline.xls`.`AVR$` `AVR$` GROUP BY `AVR$`.hospvid, `AVR$`.Valideur, 'Avril'