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create table wt( id, dstart, dstop ) as select 1 as id, 1.5 as DSTART, 3 as DSTOP from dual union all select 2 as id, 2 as DSTART, 3.5 as DSTOP from dual union all select 3 as id, 4.5 as DSTART, 8 as DSTOP from dual union all select 4 as id, 7 as DSTART, 9 as DSTOP from dual union all select 7 as id, 7 as DSTART, 12 as DSTOP from dual union all select 6 as id, 7 as DSTART, 11.5 as DSTOP from dual ;
6 rows affected
select * from wt match_recognize ( order by id measures first( dstart ) firststart_ , last( dstop) laststop_ one row per match pattern( A B* ) define B as prev( dstop ) > dstart ) ;
FIRSTSTART_
LASTSTOP_
1.5
3.5
4.5
12