In SQL, how do I create a table with several identifiers that have distinct responses, and then merge them into a single row?

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To create a table with several identifiers that have distinct responses and then merge them into a single row, follow these steps:

Step 1: Create the table

CREATE TABLE table_name (
   identifier_1 data_type,
   identifier_2 data_type,
   identifier_3 data_type,
   response_1 data_type,
   response_2 data_type,
   response_3 data_type
);

Step 2: Insert data into the table

INSERT INTO table_name 
VALUES (id_1, id_2, id_3, res_1, res_2, res_3),
       (id_1, id_2, id_3, res_1, res_2, res_3),
        . . .

Step 3: Merge the identifiers and responses into a single row

SELECT identifier_1, identifier_2, identifier_3,
       MAX(response_1) AS final_response_1,
       MAX(response_2) AS final_response_2,
       MAX(response_3) AS final_response_3
FROM table_name
GROUP BY identifier_1, identifier_2, identifier_3;

The final result will be the merged table with each identifier and its associated responses combined into a single row.