We are planning to develop a simple image viewer using oracle and VB.How do we insert an image into an oracle database table?What is required to insert an image into the oracle table?Please provide the query and explanation.
Oracle Intermedia is Oracle's own solution to storing images in
the database.
See http://www.oracle.com/technetwork/testcontent/intermedia-rel-quickstart-083139.html
and http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14302/ch_intr.htm
You can also store images in
the database independent of Oracle Intermedia
using the BLOB column type, if you prefer to avoid Oracle database extensions.
Related
I am using Oracle SQL Developer 18.3 but when I want to edit(or insert) a column with RAW datatype it shows the field as read only and does not allow to edit.
As you may know Oracle SQL Developer shows RAW datatype as hex string despite BLOB datatype that it does not show the value but you can download and upload the BLOB data.
I know that I can update(or insert) the RAW data as hex string like this :
CREATE TABLE t1(the_id NUMBER PRIMARY KEY, raw_col RAW(2000));
INSERT INTO t1(the_id, raw_col) VALUES(1, '1a234c');
But I want do it by Oracle SQL Developer GUI.
Sorry, we do not have a 'raw' editor like we have for BLOBs, so it's up to using SQL.
If you want a reason for that omission, it's partly due to the fact that RAW is not a commonly used data type in Oracle Database.
Related: if you're talking about LONG RAW
We (Oracle) recommend you stop using it, and instead convert them to BLOBs.
The LONG RAW datatype is provided for backward compatibility with
existing applications. For new applications, use the BLOB and BFILE
datatypes for large amounts of binary data. Oracle also recommends
that you convert existing LONG RAW columns to LOB columns. LOB columns
are subject to far fewer restrictions than LONG columns. Further, LOB
functionality is enhanced in every release, whereas LONG RAW
functionality has been static for several releases.
I have a Postgres 9.1 table plines with a bytea field shape.
Number of records is about 500000.
What is the best way to copy bytea data plines.shape from Postgres to a field shape of an Oracle 10g table olines?
Thank you in advance, ysa
I'd create a program in Java which would connect to PostgreSQL (using JDBC PostgreSQL driver) and Oracle (using Oracle Instant Client) simultaneously and then read a row from Postgres, put this row to Oracle table, repeat.
This would be much easier the other way around... ;-)
I m accessing remote database through DBLINK, but when trying to fire select query to fetch image stored in BLOB datatype it gives me following error:
ORA-22992: cannot use LOB locators selected from remote tables
Thanks in Advance.
You didn't provide the statement you are trying to execute, but I guess you are trying to do something which simply isn't possible in Oracle 10g.
The docs at http://docs.oracle.com/cd/B19306_01/server.102/b14200/sql_elements001.htm#sthref161 state:
Oracle Database has limited support for remote LOBs. Remote LOBs are
supported in three ways.
Create table as select or insert as select.
Functions on remote LOBs returning scalars. SQL and PL/SQL functions having a LOB parameter and returning a scalar datatype are
supported. Other SQL functions and DBMS_LOB APIs are not supported for
use with remote LOB columns.
Data Interface for remote LOBs. You can insert a character or binary buffer into a remote CLOB or BLOB, and select a remote CLOB or
BLOB into a character or binary buffer.
These are the only supported syntax involving LOBs in remote tables.
No other usage is supported.
See the link for extended examples.
To access data of type BLOB use the PIC datatype. Build your query like this:
*select(
**select PIC from AGENT_SIGNATURES_TB#DBLINK**
) as PIC
from dual*
At least that worked for me on an Oracle database.
I have 20 tables that are temp-tables where we load and validate data constantly and I have a control file for each table.
How can I have a unique control file that just changes the table the data is loaded into?
Any suggestion?
Thanks in advance!
---Oracle info---
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi
Suggest you write your control file load the data into a synonym rather than into the specific table. Begin each load run by redefining the synonym to the table you want.
Maybe you can use multiple INTO TABLE clauses, and distinguish bitween them, somehow, with the WHEN clause.
Look here for more details
I am getting the following error:
Microsoft OLE DB Provider for Oracle: Data type is not supported.
Could somebody help me figure out this please...
Situation:
Recently migrated database from SQL Server 2005 to Oracle 11g. One of the table has some columns of the data type ntext in SQL Server, which were converted to NCLOB during migration to Oracle. Client is Classic ASP page (VBScript) accessing the Oracle Database through OLEDB connection.
When the execution reaches the query (Select query) that reads the column of type NCLOB it is throwing the Microsoft OLE DB Provider for Oracle: Data type is not supported error. When I take out that particular column then the query is running fine...
QUESTION: How to read NCLOB, CLOB data values from Classic ASP pages?
Plz let me know if you need more information.....
Thank You..
I know that Microsoft's ODBC Driver for Oracle didn't support any of the LOB types-- I would wager that its OLE DB Provider didn't either given the error. Can you upgrade to the Oracle OLE DB Provider?
As an aside, since you are migrating from SQL Server to Oracle, do you really need to use the NCLOB data type? Since Oracle allows the database character set to be Unicode, you normally don't need (and don't want) to use the NVARCHAR2 or NCLOB data types unless you're stuck supporting an old database that requires a non-Unicode character set. For data that is English or Western Eurpoean in nature, storing data in a CLOB has substantial benefits in terms of storage space since the CLOB would store the data in UTF-8 rather than UTF-16 in an NCLOB (assuming that you picked a Unicode character set for the database). Eliminating the NVARCHAR2 and NCLOB columns also tends to make it much easier for front-end tools to handle the data.