Question

If I have a table created similarly to the following:

CREATE TABLE MyTable(
    id1Part1 INT NOT NULL,
    id1Part2 INT NOT NULL,

    id2Part1 INT NOT NULL,
    id2Part2 INT NOT NULL,

    UNIQUE KEY (id1Part1, id1Part2),
    UNIQUE KEY (id2Part1, id2Part2)
);

how can I now ask the database to give me the two “unique key” tuples?
(SHOW INDEX doesn’t seem to do this.)

Answer 1

I’m not sure if you’re looking for something like this

select
constraint_name,
group_concat(column_name order by ordinal_position) as cols
from information_schema.key_column_usage
where table_schema = 'db_name' and table_name = 'table_name'
group by constraint_name