2 вопросов
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senior code_explain ```sql WITH RECURSIVE org_tree AS ( SELECT id, name, parent_id, 0 AS depth, ARRAY[id] AS path FROM employees WHERE id = 42 UNION ALL SELE…
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senior code_explain ```python import asyncio async def fetch_all(urls: list[str], concurrency: int = 10) -> list[str]: sem = asyncio.Semaphore(concurrency) async def boun…