I would like you to help me with this doubt. I want to make an update in a new attribute that I add to my table, the situation is the following when doing that update I want to concatenate three columns. when I execute this code:
update saber2012_1 set estu_fecha_nacimiento = Concat(estu_nacimiento_dia,'/',estu_nacimiento_mes,'/',estu_nacimiento_anno);
nulls many attributes that previously had values for example what they see in null in the image before had their respective values.
