INSERT INTO nomdetable(champ0,champ1) Values(valeurchamp0 ,"")
INSERT INTO nomdetable(champ0,champ1) Values (valeurchamp0 ,'') soit "INSERT INTO nomdetable(champ0,champ1) Values ('" & valeurchamp0 & "','')"
"INSERT INTO nomdetable(champ0,champ1) Values ('" & valeurchamp0 & "','" & vbNullString & "')"
INSERT INTO nomdetable(champ0,champ1) Values (valeurchamp0 ,NULL)
INSERT INTO nomdetable(champ0) Values (valeurchamp0)