mysql 数据库空间统计sql 说明 INFORMATION_SCHEMA Table Reference 表参考 information_schema是‌MySQL中的一个特殊数据库，它存储了关于所有其他数据库的元数据信息。这些元数据包括数据库名、表名、列的数据类型、访问权限等。通过查询information_schema，用户可以获取到关于数据...

文章 2024-10-11 来自：开发者社区

MySQL查询数据库锁表的SQL语句

在数据库管理和开发过程中，锁（Locks）是一个重要的概念。锁的存在保证了多个事务能够安全地并发执行，防止数据的不一致。然而，当出现锁等待或死锁问题时，会导致系统性能下降或事务失败。为了有效地解决这些问题，我们需要能够查询和分析数据库中的锁情况。本文将详细介绍MySQL中查询数据库锁表的SQL语句，提供多个代码示例，并讨论锁的类型、如何避免锁等待和死锁等内容。引言 ...

文章 2024-09-16 来自：开发者社区

MySQL数据库中如何检查一条SQL语句是否被回滚

在MySQL数据库中，确保SQL操作的准确性和数据的一致性非常关键。其中，理解和检查SQL语句是否被回滚是保障数据一致性和系统稳定性的重要方面。在处理复杂的数据库事务时，了解如何确认SQL语句执行的结果及其是否被成功提交或回滚至关重要。以下是检查一条SQL语句是否被回滚的专业指导。理解事务的概念在深入了解如何检查SQL语句是否被回滚之前，...

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