update TousseDefinition set tdExplain = explain where explain is not null;
update ForeignTousseApplication set ftaExplain = explain where explain is not null;
update St_material_detail set yearMonth = year_month where year_month is not null;
update St_tousse_detail set yearMonth = year_month where year_month is not null;
alter table TousseDefinition drop column explain;
alter table ForeignTousseApplication drop column explain;
alter table St_material_detail drop column year_month;
alter table St_tousse_detail drop column year_month;