select - Locating 1 value from a SQL table holding 350,000,000 -


i have problem in need locate 1 value table contains 350,000,000. want select id stored on table use in statement.

however cannot add index.

i need way purely grab single row in quickest time possible. there functions might of me?

i have tried multiple ways , need enter value return id.

any great.

cheers.

select * (     select        table3.name     , table1.rawvalue [mpan]     , table1.ukdatagroupinstfk     , [cot indicator]     table1      inner join table2 on table2.id = table1.table2fk     inner join table3 on table3.id = table2.table3fk     left join                  (                   select                    table3.name                 , table1.rawvalue [cot indicator]                 , ukdatagroupinstfk                 table1                  inner join table2 on table2.id = table1.table2fk                 inner join table3 on table3.id = table2.table3fk                 table3.name = 'change of tenancy indicator'                  ) on a.ukdatagroupinstfk = table1.ukdatagroupinstfk     table3.name = 'mpan core'  ) x  [mpan] = ?


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