ALTER TABLE SB_Tree_Tree
ADD orderNumberBis int NULL
;

ALTER TABLE SB_Tree_Tree
ADD langBis char(2) NULL
;

update sb_tree_tree
set orderNumberBis = cast(orderNumber AS integer)
;

update sb_tree_tree
set langBis = lang
;

ALTER TABLE SB_Tree_Tree
drop column orderNumber
;

ALTER TABLE SB_Tree_Tree
drop column lang
;

ALTER TABLE SB_Tree_Tree 
RENAME COLUMN orderNumberBis TO orderNumber
;

ALTER TABLE SB_Tree_Tree 
RENAME COLUMN langBis TO lang
;