Posted By

bbrumm on 03/13/17

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sql
Oracle

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Last Edited at 03/13/17 05:13am

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Oracle EMPTY_BLOB Function

/ Published in: SQL

A few examples of the EMPTY_BLOB function.

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CREATE TABLE blobtest (
blobval BLOB
);
 
INSERT INTO blobtest (blobval) VALUES ('abcde');
 
SELECT blobval
FROM blobtest;
 
SELECT DBMS_LOB.SUBSTR(blobval)
FROM blobtest;
 
UPDATE blobtest
SET blobval = EMPTY_BLOB();
 
SELECT DBMS_LOB.SUBSTR(blobval)
FROM blobtest;
 
UPDATE blobtest
SET blobval = NULL;
 
SELECT DBMS_LOB.SUBSTR(blobval)
FROM blobtest;