sql server - Advanced Sql query to identify missing data -

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i dealing sql server table 'suburb' has suburb_id column , adjacent_suburb_ids column. adjacent_suburb_ids column comma separated string of other suburb_ids.

i have found of records not reciprocating -

e.g "suburba" has "suburbb" id in adjacent_suburb_ids "suburbb" not have "suburba" id in adjacent_suburb_ids

i need identify suburbs not reciprocating adjacent_suburbs, can sql query?

please not comment on data/table structure not in control , can't change it.

assuming i'm understanding question correctly, can join table using like , not like operators:

select s.suburb_id, s2.suburb_id s2id suburb s    join suburb s2 on      s.suburb_id <> s2.suburb_id     , ',' + s2.adjacent_suburb_ids + ','          '%,' + cast(s.suburb_id varchar(10)) + ',%'      , ',' + s.adjacent_suburb_ids + ',' not          '%,' + cast(s2.suburb_id varchar(10)) + ',%'

you need concatenate comma before , after search within set. , yes, if had chance, should consider normalizing data.


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