viewing info about indexes

hi

since indexes are logical structures which keep pointers to tables records. i.e it keeps the rowid for that record which is to be indexed. how would i view this rowid for that record .

thanks

What do you mean by logical structure? Index is physical structure and keeps the index data saperately.
ROWID for a row you can get from the base table.

select rowid from table_name where_clause

thanks for your help

i had another query. while calculating pctfree for b-tree indexes the formula given is percentage of total space minus the block header. where would i get the block header info from.

in the manuals they also have mentioned that pctfree parameter for an index works differently from that of a table. what is the differene

thanks