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select r.rollid as rollid from zh1_rool r where r.date_p >=to_date('2009-11-26 23:59:59','yyyy-mm-dd hh24:mi:ss') and rollid not in
(select t.lot_number as rollid
from inv.mtl_onhand_quantities_detail t
left join mtl_system_items_b mi
on t.inventory_item_id = mi.inventory_item_id
where mi.segment1 like '101%' and mi.organization_id = 102)


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1. ASCII
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SQL> select ascii(A) A,ascii(a) a,ascii(0) zero,ascii( ) space from dual;
A A ZERO SPACE
--------- --------- --------- ---------
65 97 48 32
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declare    
    v_isexist number(3,0):=0;  
begin  
    select count(1) into v_isexist from sys.all_objects where owner = 'TEST' and object_type = 'TABLE' and object_name = 'TAB1';
    if  v_isexist>0 ......
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