Calculate total size of clob column in a table

how to Calculate total size of clob column in a table.
Thanks ,
Sakthivel

SAKTHIVEL wrote:
I would like to calculate table size and particular clob column size inside that table. The size of the table and the size of the LOB are two totally different things.
Barring cases where the LOB is less than 4k and stored inline, the LOB data is stored outside the table in a separate segment.
If you want to get the combined size of the table and of its LOB segments, you could do something like
SELECT SUM(bytes)/1024/1024 gb
FROM dba_segments
WHERE (owner = <<table owner>> and
       segment_name = <<table name>>)
    OR (owner, segment_name) IN (
        SELECT owner, segment_name
          FROM dba_lobs
         WHERE owner = <<table owner>>
            AND table_name = <<table name>> )Justin

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Hi ,
I created a table as below
create table my_tab(no number(10), name varchar2(20));
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It's not the way to find the size of table or any object in database, you can't get by assuming or by calculating datatype size.The below is the query to get object size in database.
select segment_name
,      bytes "SIZE_BYTES"
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To check whether there is any size mismatch between columns of two tables

Hi,
Here i got two tables T and M where i am going to migrate data from T to M. But before migrating i need to check whether all the data in source table fits into destination table columns. The datatypes of all columns in source table T is of Varchar2 only as it is a temp table.
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I think it can be done using arrays or plsql tables.
Can any one help in this regard.

>
Now my task is I have to do a prevalidation of the data in 'T' that whether all the data in those columns will suit for the destination table columns respectively (to check whether there is any size mismatch). This check should be done dynamically.
>
Just because the source table T_Amt column is defined as 50 doesn't mean any of the data is really that long. So the data itself needs to be checked. That is just what a simple query can do.
See my answer in this thread Posted: Jul 25, 2012 1:14 PM
Re: Help in Execute Immediate - Invalid relational Operator
Here is the modified sample query and results for a query of a clone of the EMP table with some modified data
select count(*) cnt,
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There are 14 total records, 2 where JOB is null, 4 where the JOB is SALESMAN. The MIN length of the JOB data is 5 and the MAX is 9.
Look at the date values. The results tell me I have some problem data.
The length data tells me if I try to put the JOB data into another table I need to define the length as at least 9 or it won't fit.
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1 x y
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If I understand you right, you want each row in your table to contain an emp_id and the complete text of a multi-record .csv file.
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HTH
Regards Nigel
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2 from esb_output_temp t
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5           'http://schemas.xmlsoap.org/soap/envelope/' as "soap"
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8         )
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/Kaj

Calculate total size of clob column in a table

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