Determining the size of embedded images
The SQL queries demonstrate how to show the amount of space that each BLOB field is consuming. Both of these queries return the size of the field in bytes.
SQL Server
SELECT BLOB_ID, DESCRIPTION, FILE_NAME, 
DATALENGTH(OBJECT_DATA)
FROM FSEMBEDDEDOBJECTS
 
	     Oracle
Requires that the Oracle 
		  DBMS_LOB package is installed. 
		
SELECT BLOB_ID, DESCRIPTION, FILE_NAME, 
DBMS_LOB.GETLENGTH(OBJECT_DATA)
FROM FSEMBEDDEDOBJECTS