Problem Statement
There are N sports players.
Among them, there are M incompatible pairs. The i-th incompatible pair (1≤i≤M) is the Ai-th and Bi-th players.
You will divide the players into T teams. Every player must belong to exactly one team, an…
你是否曾在 SELECT 查询中看到过 WHERE 11 条件。我在许多不同的查询和许多 SQL 引擎中都有看过。这条件显然意味着 WHERE TRUE,所以它只是返回与没有 WHERE 子句时相同的查询结果。此外,由于查询优化器几乎肯定会删除它,因此对查询执行时间没…