mysql - How to retrieve all records based on condition -


database records

i have table below each n_id(i.e 43, 54, 32, 46 , 24) has 3 records. due reason, n_id "21 , 39" has 1 record.

requirement: query records excluding c_type ! = 2 , status should 1.

query used:

select a.n_id, a.c_type, a.c_file_type, a.status  table  a.config_type != 2        , a.status = 1        , exists (select 1                    table b                    a.n_id = b.n_id group b.n_id, b.c_type, b.status                    having count(b.status) > 1                   )

output: i'm getting records expected excluding c_type = 2.

now question how change existing query additional records n_id='21, 39'? since records not retrieved part of query.

table data got above query except record n_id = 21, 39, not retrieved. want highlighted records well.

new table

what happens if remove "having count(b.status) > 1" in exists query? filter out records that, when grouped according group by, result in null status. don't think because group this.


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