select 'alter sequence '||user_sequences.sequence_name||' increment by 50000000 nocache;
select '||user_sequences.sequence_name||'.nextval from dual;
alter sequence '||user_sequences.sequence_name||' increment by 1 nocache;'from user_sequences
?
select 'alter sequence '||user_sequences.sequence_name||' increment by 50000000 nocache;
select '||user_sequences.sequence_name||'.nextval from dual;
alter sequence '||user_sequences.sequence_name||' increment by 1 nocache;'from user_sequences
?