PL/SQL :: How To Convert BLOB To BASE64 String And Back
Aug 15, 2012
We have a forms application in Forms 10g. We scan a document and gets it to a image item in the Form. Now, we need to pass this image to a 3rd party application (document mgt. system, ). They have given us a web-service for this. We have to convert the image to a BASE64 string and then invoke the web-service method and input it.
The, 3rd party application document management system will also send images as BASE64 strings through the web-service. We need to convert them back to a blob and put to an image item in the form so that it can be viewed by the end-user.
So, how can we convert a image item in form (as BLOB) to a base64 string and also do the reverse???
SQL> SELECT * FROM NLS_DATABASE_PARAMETERS where parameter = 'NLS_CHARACTERSET'; PARAMETER VALUE ------------------------------ ---------------------------------- NLS_CHARACTERSET AL32UTF8 SQL>
There is table (VIN_TEMP) in my company database containing following records. It seems like this table should contain some greek language special chracter values instead of this weird data.
Client are reporting these records as invalid and requesting us to fix. As i investigated i found out, this table was created and loaded few year back. Client sent us one time files which we loaded into this table. I was able to find the code which was actually used to load this table, but unfortunately i was not able to find the raw files where we load this data from...
It seems like Previous Developer specified character set "UTF8" statement, in his sql loader script, to load this data. It seem those file contain some Greek language special character data which was not support by "UTF8" charater set and result in creating those invalid data. My Job is to fix these invalid records and convert them back to its original values which were present in the raw file. I tried to contact client and see if i can find out the raw files but no luck. I tried to use convert function as mention to convert this data from "UTF8" to our current character set format but no luck.
I have a table where user can store images in clob format.Need to convert the same image to blob and store in a dummy table.
I tried using this --function creation CREATE OR REPLACE FUNCTION FN_CLOB_TO_BLOB(CLOB_IN IN CLOB) RETURN BLOB IS POS PLS_INTEGER := 1; BUFFER RAW(32767);
How can i convert data in NCLOB column to BLOB variable? NCLOB now is tored in UTF16. The data character set is ISO8859P2. Need to keep BLOB at unicode.
I want to read content from blob column and write into file using dbms_output.put_line. See below code. i am getting PLS-00215: String length constraints must be in range (1 .. 32767) error.
set serveroutput on DECLARE l_file UTL_FILE.FILE_TYPE;
[Code]....
the length of the blob column is 1081656. so i have changed in raw(1081656) in above code. after the execution, i am getting the below error PLS-00215: String length constraints must be in range (1 .. 32767).
I have a table that has column with BLOB datatype. I am trying read only the inputted String from the BLOB datatype column. I have used the below query,
SELECT utl_raw.cast_to_varchar2(column1) FROM TAB1 and it gives the result as <H2><FONT color=#cc0000><EM><U>test</U></EM></FONT></H2>
However I would like to extract only the string "test" which is inputted. Is there any build-in function in oracle which will satisfy this requirement?
I can't think of a clue how to get the desired results.
I have table column with varchar2 type. I need to convert the strings in this column to ascii values. Now I know Oracle function ascii() converts a character to ascii values. But it just converts the first character of the string and ignore the others. I need to convert the whole string to ascii values. For example, if I need to convert the string "USA", the result should be '858365' (as in U decimal value is 85, S decimal value is 83 and A decimal is 65).
I think I need to use instr() function and also PL/SQL to pass all these strings through a cursor and then use a loop but I'm still confused about it.
I have a string in this format '2011/06/01 00:00:00'. How do I convert this to date format.I tried to_date,to_char and they give errors invalid number & literal does not math format string. I don't have much control on the string since that is the way is comes from the application.
I have a column which has has all numeric values 3 digits to 7 digits in length but all in string format, I want to use seomthing other than to_number function.
Would like to use within the ETL tool, where to_number function isn't getting recognized.
i have a column 'name' in which value is 'Shailesh Negi',i have to insert 'shailesh' into'first name' column and 'Negi' into 'last name' column respectively.
What I want to do is, translate '10100010' into the string '(Bananas,Apples,Kiwi)' using SQL-only. As a bonus it would be nice if the string is completely empty if all flags are '0', so no '()'.
The requirement is, the combination of col1,col2,col3 and col4 should always be unique, and wherever the col1, col2,col3 are same then col4 should be the sequence, starting from 1. Likewise the data should be updated back to the table.I'm able to do this using PL/SQL. Can I do the same using a single update statement?
I want a function that'll execute a query and return the whole table record then i need to somehow pick a column in that record and return the data in that column
So like
function something(p_param varchar2) return table_record something('blah).employee_number
I'm making a menu in my form, wherein it has FILE, TRANSACTION and REPORT. Under FILE it has BACK, and LOGOUT. In my back menu item, i want to go back to the previous block or previous module. I used previous_block but it's not working in some of my blocks.
I come from a world of MSSQL and have been thrown into doing some Oracle work. Great! Ok, moving on.. I work in an environment where I do not have direct access to the database tables that I need data from. As a workaround, I have been asked to create a stored procedure that will be loaded into our CRM system's production db once it goes through the internal "approval" process.Basically, I need to return a result set back to the client by calling a stored procedure.
Version 1 of this that was already in place was done with the following code.
procedure events_by_day (p_start_date IN OPERATION_LOG.DT%type, p_end_date IN OPERATION_LOG.DT%type, p_results OUT SYS_REFCURSOR) IS BEGIN OPEN p_results FOR
[code]....
Then the code is executed from the client side like so:
When we are running a query it is giving us the result based on the conditions .But to know what exactly is happening in the database when we are running a query against it and how finally it returns the result.
I have a 3 node RAC server on Windows Server 2008. Last week the hard drive went out on one of the nodes and I have had to rebuild as I could not recover anything.
I went through and deleted the old node and now I have just finished adding the new node back to my cluster via documentation. Once I created the new instance on that server DBCA attempted to start and it failed gaving me a crs error. I found out later that the other 2 nodes went down and the new one that did not start correctly was the only one up!! I went and stopped the new instance and restarted the first 2. The associated services did not start with the instance so I had to start each manually. The trace files show an ORA-29702 error with cluster group service and the instance being stopped on both of the existing nodes. No other error messages stood out.
Now I cannot get any crs services to start on that 3rd node even if I attempt to start manually. I have also tried stopping all and restarting and that does not work. I found another post on this forum from you and followed it. The ASM service was fine the entire time through all the logs and I don't know how to verify LMON in Windows but I didn't see any LMON errors in the alert log. Also, the voting disks are online. Each node has their own and they are mirrored. Where else to look?
here i have an question with oracle database backup strategy.my question is
how to backup my oracle database call DB11G without archived logs while the database is open for user activity and also this should be the base for an incremental backup strategy?
I am trying to generate a software that used VB as the front end and Oracle 10G as the back end. I have noticed that the date format is VB is : m/dd/yyyy whereas the date format in oracle is dd-mm-yyyy. Whenever i try to insert a tuple with either of the date formats, the program halts running and after a long time , i get a message saying a deadlock was encountered. I have never had any formal introduction to either of the two tools
