effectivement, je viens juste de simplement ajouter 1* devant ce que 
Pierre-Yves avait indiqué, et ça réalise une conversion de type.
Impeccable ! du coup, ça répond à mon besoin initial.
Merci à tous !
Le 30/05/2021 à 21:39, yves dutrieux a écrit :
Sur base de l'idée de Pierre-Yves ,
SELECT "article", 1*locate('1',concat('1',"promotion")) FROM "data"
Te donnera ce que tu souhaites ;)
Yves
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