Based in the csv file column header it should create table dynamically and also insert records of that csv file into the newly create table.
Ex:
1) If i upload a file TEST.csv with 3 columns, it should create a table dynamically with three
2) Again if i upload a new file called TEST2.csv with 5 columns, it should create a table dynamically with five columns.
Every time it should create a table based on the uploaded csv file header..
how to achieve this in oracle APEX..
Thanks in Advance..
Without creating new tables you can treat the CSVs as tables using a TABLE function you can SELECT from. If you download the packages from the Alexandria Project you will find a function that will do just that inside CSV_UTIL_PKG (clob_to_csv is this function but you will find other goodies in here).
You would just upload the CSV and store in a CLOB column and then you can build reports on it using the CSV_UTIL_PKG code.
If you must create a new table for the upload you could still use this parser. Upload the file and then select just the first row (e.g. SELECT * FROM csv_util_pkg.clob_to_csv(your_clob) WHERE ROWNUM = 1). You could insert this row into an Apex Collection using APEX_COLLECTION.CREATE_COLLECTION_FROM_QUERY to make it easy to then iterate over each column.
You would need to determine the datatype for each column but could just use VARCHAR2 for everything.
But if you are just using generic columns you could just as easily just store one addition column as a name of this collection of records and store all of the uploads in the same table. Just build another table to store the column names.
Simply store this file as BLOB if structure is "dynamic".
You can use XML data type for this use case too but it won't be very different from BLOB column.
There is a SecureFile feature since 11g, It is a new BLOB implementation, it performs better than regular BLOB and it is good for unstructured or semi structured data.
Related
I'm currently trying to create txt files from all tables in the dbo schema
I have like 200s-300s tables there, so it would takes up too much times to create it manually..
I was thinking for creating a loop.
so as example (using AdventureWorks2019) :
select t.name as table_name
from sys.tables t
where schema_name(t.schema_id) = 'Person'
order by table_name;
This would get all the table name within the Person schema.
So I would loop :
Table input : select * from ${table_name}
But then i realized that for txt files, i need to declare all the field and their data types in pentaho, so it would become a problems.
Any ideas how to do this "backup" txt files?
Using Metadata Injection and more queries to the schema catalog tables in SQL Server. You not only need to retrieve the table name, you would need to afterwards retrieve the columns in that table and the data types, and inject that information (metadata) to the text output step.
You have in the samples directory of your spoon installation an example on how to use Metadata Injection, use it, along with the documentation, to build a simple example (the check to generate a transformation with the metadata you have injected is of great use to debug)
I have something similar to copy data from one database to another, both in Oracle, but with SQL Server you have similar catalog tables as in Oracle to retrieve the information you need. I created a simple, almost empty transformation to read one table and write to another. This transformation has almost no information, only the database origin in the Table Input step and the target database in the Table Output step:
And then I have a second transformation where I fill up all the information (metadata) to inject: The query to perform in the Table Input step, and all the data I need in the Table Output: Target table, if I need to truncate before inserting, the columns from (stream field) and to (Table field):
Hi I want to create a csv file using plsql utl file. For that I am creating cursor in utl file but I dont want to enter duplicate data. Because I want to create that csv file daily from the same table. Please help
I tried by cursor but I have no idea how to restrict duplicate entries because I want to create the csv file from same table on daily basis
A cursor selects data; it is its where clause that filters which data it'll return.
Therefore, set it so that it fetches only rows you're interested in. For example, one option is to use a timestamp column which tells when was that particular row inserted into the table. Cursor would then
select ...
from that_table
where timestamp_column >= trunc(sysdate)
to select data created today. It is up to you to set it to any other value you want.
I am using Talend Studio with objects tFileInputDelimited row1(Main) to tOracleOutput what I want is to transfer the data in xml file to Oracle table.
I want to transfer the values of the last two columns (product_label and email_order) of my excel file to the product table which has this column structure (PRODUCT_ID,PRODUCT_CODE,PRODUCT_LABEL,EMAIL_COMAND
ORDER_ID).
Also, I want to process this condition if a row in my excel file contains an empty product code column then is not insert the column values product_label and email_command.
XML File to load
Product table
enter image description here
what is the proper settings in tFileInputDelimited , or do I need to use other tools?
Refer this image for your reference
Use tFileInputXMl file and filter the records by using tFilterRow and then connect with tOracleOutput
While development I was in need to create sqlite data base using dataset.
First create empty database file in sqlite. Then using dataset create table and dump data.
Is it possible using some dataset method?
I have done one thing
I have used one query
select * from sqlite_master where type='table'
That will give me schema of sqllite file from where I want to copy data.
On other end I will execute query return by above query.
That will help to create table dynamically.
On by one I used dataadapter to fill data and assigned dataset datatable data and used
Dataadapter. Update method.
How to insert data from multiple files having different columns into a table in Oracle database using SQL Loader with Single control file.
Basically ,
We have 3 CSV files
file 1 having columns a,b,c
file 2 having columns d,e,f
file 3 having columns g,h,i
We need to insert the above attributes to a Table named "TableTest"
having columns a,b,c ,d,e,f,g,h,i
Using single control file
Thanks in advance
You really can't. You can either splice the .csv files together (a lot of nasty work) or create 3 tables to load and then use plsql or sql to join them together into your target table.