selecting huge data in oracle - oracle

I have to select data form a table under Oracle 10.The statement I have simply used is
select * from table_name;
After the execution of the statement it first fetches 50 rows.
Thenafter I just select ctrl+A to select all the rows and export it to a csv file.
But it is taking a lot of time.
Is there a better way to fetch all the rows and capture the data to csv?

You can use Oracle SQL Developer tool connect to database and right click on Table which is the table you want export the data then select Export option there you can select Format as CSV
or
After select * from table_name; go to result then right mouse click, then select Export then select Format as CSV and select the path where you want save then then Next then Finish

Related

Cursor and CSV using utl_file package

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.

Fetch table query in Oracle database for data extraction?

I want Oracle SQL Developer to create a SELECT statement "automatically" for the table that are in databse, I want the table query for extraction and so that I do not have to type for all.
Let me guess: you want SQL Developer to create a SELECT statement "automatically". If so, then drag table into the editor and choose an option:
Result:
SELECT
ename,
job,
sal,
comm
FROM
bonus;

How to take backup as insert queries from oracle select statement inside UNIX batch job?

I wrote a UNIX batch job which updates a table with some "where" conditions. Before updating those records, i need to take the backup (insert statements) of the records that is returned with the "where conditions" and store it in ".dat" file. Could you please help on this???
The most straightforward way to create a backup of the table would be to use a create table statement using the where condition(s) of your update statement. For example, let's take a sample update statement:
UPDATE sometable
SET field1 = 'value'
WHERE company = 'Oracle'
This update would update the field1 column of every row where the company name is Oracle. You could create a backup of sometable by issuing the following command:
CREATE TABLE sometable_backup AS (SELECT * FROM sometable WHERE company = 'Oracle');
This will create a table called sometable_backup that will contain all of the rows that match the where clause of the update.
You can then use Data Pump or another utility to create an export .dat file of that specific table. You can use that .dat file to import into other databases.

Generating sql insert into for DataGrip

When you run a query (a SELECT statement) in the console, the data retrieved from the database are shown in table format in the Result pane of the Database Console tool window.
I've searched through datagrip Help and I'm just wondering if there is anyway out there that can be used to generate INSERT INTO scripts for a tables' content or rows in table format?
Choose SQL Insert extractor in the drop-down menu.
Them you'll be able to copy (Ctrl/Cmd+C) data as a bunch of INSERTS. Or use Export button next to the extractor.

Include ROWID in Dataset when Exporting from Toad

I am trying to export a dataset from Toad to Excel (or text delimited file). I need the ROWID to display in the resulting file.
I have "Show ROWID in editable grids" selected in View >> Toad Options >> Data Grids >> Data.
ROWID is being displayed in the Data tab of Schema Browser in Toad.
When I run Export Data from Schema Browser; under the Dataset tab the ROWID is being displayed in the SQL statement.
But when I export the dataset, I do not get the ROWID showing in the resulting (output) file.
I am running Toad 10.5.0.41.
Any advice on what I am missing?
Thanks in advance,
Marwan
Why don't you explicitly add ROWID to your SQL statement?
select rowid, t.*
from my_table t;

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