declare i_product_id inventory.product_id%type; i_product_description inventory.product_description%type; i_product_status inventory.product_status%type; i_std_shipping_qty inventory.std_shipping_qty%type; begin //sql语句，将查询出来的值放到定义的变量中 select product_id, product_description, product_status, std_shipping_qty into i_product_id, i_product_description, i_product_status, i_std_shipping_qty from inventory where product_id=( select product_id from contract_item where contract_no=&&contract_no and item_no=&&item_no ); if i_product_status='shipped' then update contract_item set arrival_date=sysdate+7 contract_no=&&contract_no and item_no=&&item_no; //这里的elseif 是连着写的 elseif i_product_status='ordered'then updatecontract_item setarrival_date=add_months(sysdate,1)//加一个月 whereitem_no=&&itemnoandcontract_no=&&contractno; else updatecontract_item setarrival_date=add_months(sysdate,2) whereitem_no=&&itemnoandcontract_no=&&contractno; insertintoorders values(100,i_product_id,i_std_shipping_qty); end if; end if; commit; end;