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https://community.oracle.com/thread/1079088
Jun 11, 2010 · Hi, i'm tring to export data with sqldeveloper but it fail with: "No valid columns available for exports, we do not currently support clob or blob columns" No clob/blob column in table and no dblink in query: select carcc, carnr, carpr, carre, carnu from my_tab_ph where.... can depends on some configuration parameter of my developer? Thank you.
https://stackoverflow.com/questions/42244941/how-to-export-clob-field-datas-in-oracle-sql-developer
How to export clob field datas in oracle sql developer. Ask Question Asked 2 years, ... fields that are clob or blob then it not included in insert query. ... How do we handle problem users? 2020 Developer Survey: any topic suggestions? Visit chat.
https://docs.oracle.com/cd/B19306_01/appdev.102/b14249/adlob_tables.htm
If a LOB column is initialized with EMPTY_CLOB() or EMPTY_BLOB(), then no LOB value exists, not even NULL. The row holds a LOB locator only. No additional LOB storage is used. LOB storage properties do not affect BFILE columns. BFILE data is always stored in operating system files outside the database.
https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1019631214472
Here we have a scenario where we need to store a string which sometimes goes beyond 4000 char. Currently we are using varchar2(4000) for it and since it can store only up to string of length 4000 we are planning to change it to clob, blob or multiple rows based on the performance.
https://blogs.oracle.com/xmlpublisher/blob,-clob,-raw-and-looooong
The data engine introduced some new support for data types other than the normal varchar, date and number formats in 10.1.3.3. We now have support for the long, raw, clob and blob formats - and you do not have to do anything in the data template to handle these formats.
https://stackoverflow.com/questions/22807316/oracle-blob-data-are-missing-in-my-export-file
For a CLOB it might give you the first 4903 chars followed by an ellipsis in the string literal, but I'm not sure; for a BLOB even that wouldn't make any sense. If you want to transfer data between databases you should consider data pump export/import , or if you (or your client) are restricted by server access then you could fall back to ...
https://docs.oracle.com/cd/B19306_01/appdev.102/b14249/adlob_intro.htm
1 Introduction to Large Objects. This chapter introduces Large Objects (LOBs) and discusses how LOB datatypes are used in application development. ... such as a BLOB or CLOB where the data can then be manipulated. ... External LOBs do not participate in transactions. Any support for integrity and durability must be provided by the underlying ...
http://dba-oracle.com/t_export_unload_blob_clob.htm
How to export/unload a BLOB/CLOB. Oracle Database Tips by Donald BurlesonNovember 19, ... we do not see much of a difference between the export speed using Java and PL/SQL. This is because the 32k buffer of PL/SQL is acceptable for small files. ... This Oracle documentation was created as a support and Oracle training reference for use by our ...
https://asktom.oracle.com/pls/apex/asktom.search?tag=comparing-two-clob-columns
Comparing Two CLOB columns; Breadcrumb. ... It is not clear. if so - houston we have a problem, triggers do not necessarily FIRE when LOBS are modified!!!! Is the the restriction about triggers and lobs still valid ? ... There is now DML BEFORE ROW Trigger :new support for LOBs. This means that triggers on LOBs follow the same rules as triggers ...
https://www.devart.com/dotconnect/oracle/docs/Lob.html
Working with CLOB data generally is same as working with BLOB data. The difference is in representation of Value property. For CLOB and NCLOB data types when you read from OracleLob.Value property, you get strings. The data is transparently decoded so you do not have to take care about its character set.
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