From: | Muhammad Salahuddin Manzoor <salahuddin(dot)m(at)bitnine(dot)net> |
---|---|
To: | Rich Shepard <rshepard(at)appl-ecosys(dot)com> |
Cc: | pgsql-general(at)lists(dot)postgresql(dot)org |
Subject: | Re: UPDATE with multiple WHERE conditions |
Date: | 2024-06-12 21:31:43 |
Message-ID: | CAKD7CD=p9KZfB9u+A=p2-Eju1hkUGBnwJMg+xEk82K6wm3mcTA@mail.gmail.com |
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Lists: | pgsql-general |
Greetings,
You can use Temporary table. You could create a temporary table with one
column containing the condition values and then use it to update your main
table. This approach can be more flexible and cleaner than writing a script
with multiple update statements.
-- Create a temporary table with one column containing the condition values
CREATE TEMPORARY TABLE temp_conditions (condition_value TEXT);
-- Insert the condition values into the temporary table
INSERT INTO temp_conditions (condition_value) VALUES
('value1'),
('value2'),
('value3'),
-- Add more values as needed...
('value295');
-- Update the boolean column based on the condition values
UPDATE your_table
SET boolean_column = true
WHERE condition_column IN (SELECT condition_value FROM temp_conditions);
-- Clean up: drop the temporary table
DROP TABLE IF EXISTS temp_conditions;
*Salahuddin (살라후딘**)*
On Thu, 13 Jun 2024 at 02:28, Rich Shepard <rshepard(at)appl-ecosys(dot)com> wrote:
> I have a table with 3492 rows. I want to update a boolean column from
> 'false' to 'true' for 295 rows based on the value of another column.
>
> Is there a way to access a file with those condition values? If not, should
> I create a temporary table with one column containing those values, or do I
> write a psql script with 295 lines, one for each row to be updated?
>
> TIA,
>
> Rich
>
>
>
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