How to stream data sorted from a table in postgresql?

by tressie.damore , in category: MySQL , 6 months ago

How to stream data sorted from a table in postgresql?

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1 answer

by ryan.murray , 6 months ago

@tressie.damore 

To stream data sorted from a table in PostgreSQL, you can use the COPY command along with ORDER BY clause to sort the data before streaming it. Here's a step-by-step guide to achieve this:

  1. Connect to your PostgreSQL database using a client tool such as psql or any GUI tool like pgAdmin.
  2. Run the following query to stream the data from your table sorted by a specific column:
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COPY (SELECT * FROM your_table ORDER BY your_column) TO STDOUT;


Replace your_table with the name of the table you want to stream data from and your_column with the column you want to sort the data by.

  1. If you are using psql client, you can redirect the output to a file by using copy command like this:
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copy (SELECT * FROM your_table ORDER BY your_column) TO '/path/to/output_file.csv' CSV HEADER;


This command will stream the sorted data from the table into a CSV file with headers included.

  1. If you want to stream the data sorted from the table programmatically, you can use your preferred programming language and its PostgreSQL driver to execute the SQL query and process the results accordingly.


By following these steps, you can easily stream data sorted from a table in PostgreSQL.