How do you select all but one column in PostgreSQL?

 In PostgreSQL, there isn't a built-in SELECT * EXCEPT syntax to select all columns except one. However, you can achieve this in a few different ways:

Method 1: Explicitly specify the columns you want to include

Instead of using SELECT *, you can manually list all the columns that you want to select, excluding the one you don't need.

SELECT column1, column2, column3
FROM your_table;

Method 2: Use information_schema.columns

If you have a large number of columns and you don't want to manually list them, you can query the information_schema.columns table to generate a list of column names and dynamically exclude one.

Here's a dynamic SQL approach using information_schema.columns to generate the required SQL:

DO $$ 
DECLARE
    col_names text;
BEGIN
    -- Get column names, excluding the one you don't want
    SELECT string_agg(column_name, ', ')
    INTO col_names
    FROM information_schema.columns
    WHERE table_name = 'your_table' 
    AND column_name != 'column_to_exclude';

    -- Execute the dynamically generated query
    EXECUTE 'SELECT ' || col_names || ' FROM your_table';
END $$;

This will dynamically select all columns except column_to_exclude from your_table.

Method 3: Use a tool or script to generate the SQL

If you are working with a complex schema, some PostgreSQL client tools, such as pgAdmin or DBeaver, may allow you to generate queries with column selection, letting you exclude specific columns visually. Alternatively, you can use a script in your programming language to query the column names and build the SQL dynamically.