Truncate a field before inserting
Suppose I have the following text:
Array: mytable
field: username (VARCHAR2 (35))
field: zip (VARCHAR2 (5))
I am importing data from an excel with columns username and zip file. A couple of the usernames contains more than 35 characters, and some postal codes are in the format xxxx-xxxxx, therefore containing more than 5 characters.
I tried to write an insert before truncating the data until they are inserted. For any user name that is longer than 35 characters in Excel, simply truncate the username to the first of 35 characters. Similarly, for any ZIP code which is above 5 characters, just truncate the zip on the first 5 characters.
The trigger for postal codes:
CREATE OR REPLACE
Trigger_zipc RELAXATION
BEFORE INSERTING
ON mytable
FOR EACH LINE
BEGIN
SELECT substr (: new .zip, 1, 5)
IN: new.zip
Double;
END;
However, I get the error: ORA-12899: value too large for column
I understand that this happens because the value is read before my validation, and because the value is too large, it is not allowed to insert.
I'm not sure where to go from here. Any suggestions?
Is it excel file or a csv file.
I think you can look into creating an external table as well.
Before inserting it just to make a substring.
Something along the lines.
CREATE TABLE ext_data ( username CHAR(500), zip CHAR(500)) ORGANIZATION EXTERNAL (TYPE ORACLE_LOADER DEFAULT DIRECTORY ext_tab_dir ACCESS PARAMETERS (FIELDS TERMINATED BY ',') LOCATION ('csv.dat')); insert into mytable select substr(username,1,35) , substr(zip,1,5) from ext_data;
I hope this helps.
Alvinder
Tags: Database
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----------------
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