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SEQUENCE T N
---------- - -
1 a b
2 b c
4 d e
5 e f
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select sequence, type, next_type from (
select sequence, type, lead(type) over(partition by id order by sequence) next_type
where next_type is not null
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ROW_NUMBER() OVER (ORDER BY sequence) NEWSEQENCE
, T1.type TYPE1
, T2.type TYPE2
FROM yourtable T1
INNER JOIN yourtable T2 ON T1.id = T2.id AND T1.sequence + 1 = T2.sequence
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