How to debug a request?

Question

PostgreSQL

There is a large query with a bunch of subqueries and joins, the result is a string that should not be there. How to determine which part of the query pulls up this row?

Answer 1

Studio request.
How to debug depends on the tool. If you have PgAdmin, PyCharm or something like that, you can execute the request in parts, and so step by step track where the result goes the wrong way.