sql - how to select the value from sub query result -


i have following 4 tables mentioned below , trying extract value acc_number sub query, please me optimized correct syntax 

account table ------------------------- |acc_number  |  acc_name| -------------------------  account_details table --------------------------------- |acc_number |deal_number|deal_type| ---------------------------------  deals table ------------------------------------ |deal_number |deal_type|dep_number | ------------------------------------  department table ------------------------ |dep_number  | dep_name | ------------------------  select  d.deal_number, d.d_type, dp.department_number   deals d , department dp  d.dep_number = dp.dep_number , d.deal_number not in                  (select acd.deal_number                     account_details acd, account ac                    ac.acc_number = acd.acc_number                         , deal_type = 'xxxx'                          , acd.deal_number = d.deal_number)

hi, if using d.deal_number not in means records join not present in account , account_details table, never acc_number particular deals?

if ready alteration in current syntax, can play joins acc_number in query result:

example:

select  d.deal_number, d.d_type, acd.acc_number, dp.department_number   deals d  join department dp on d.dep_number = dp.dep_number left join account_details acd on acd.deal_number = d.deal_number join account ac ac.acc_number = acd.acc_number deal_type = 'xxxx'              , acd.deal_number = d.deal_number

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