Problem in the code to update a column value based on the value of a column

Question

Merge into item_TMP S using items I on (S.ITL_ITEM= I.ITEM_ITEM)
when matched then
update set
S.ITL_UOM = I.ITEM_UOM;
when not matched then null;

Answer 1

Try
update Item_TMP set ITL_UOM = (select ITEM_UOM from ITEMS
                                                 where Item_TMP_TMP.ITL_ITEM = ITEMS.ITEM_ITEM
                                                  and items.ITEM_UOM is not null )
where ITL_ITEM in   (select  ITEMS.ITEM_ITEM from ITEMS
                                                 where items.ITEM_UOM is not null )
/Cheers, APC
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