How to find the size of a Table

Dear all,
How can i find the size of a table in a schema and size of the schema also.
Thanks
Mahi

Try out with the help of this package, which will give out the total bytes, unused bytes, calculate the free bytes from total byes-unused bytes.
dbms_space.unused_space(
upper(oname),upper(tbname),upper('TABLE'),
total_blocks, total_bytes,
unused_blocks, unused_bytes,
last_used_extent_file_id ,
last_used_extent_block_id,
last_used_block
);

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How to find the size of a Table

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