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一些 DDL 命令（当前只有TRUNCATE和表重写形式的ALTER TABLE）对于 MVCC 不是安全的。这意味着在截断或者重写提交之后，该表将对并发事务（如果它们使用的快照是在 DDL 命令提交前取得的）呈现出空表的形态。这只对没有在该 DDL 命令开始前访问所讨论的表的事务存在问题 — 任何...

阿里云文档 2023-09-13

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Ganos支持利用多个CPU提升查询或计算性能，这种特性被称为并行操作。Ganos支持并行执行SQL语句和并行操作UDF。

阿里云文档 2023-09-13

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Ganos支持利用多个CPU提升查询或计算性能，这种特性被称为并行操作。Ganos支持并行执行SQL语句和并行操作UDF。

阿里云文档 2023-09-03

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文章 2022-05-06 来自：开发者社区

阿里云数据库有哪几个热门数据库产品？要注意事项及优惠？

在阿里云众多数据库产品中，用户购买最多的是关系型数据库下的云数据库 RDS MySQL 版、云数据库 RDS SQL Server 版、云数据库 RDS PostgreSQL 版，下面是这几个热门数据库产品：1、云数据库 RDS MySQL 版价格表：实例规格族规格代码 CPU（核）内存最大连接数最大IOPS 规格参考价格通用型 rds.mysql.c1.large 8 16GB（通用....

文章 2021-12-25 来自：开发者社区

阿里云数据库有哪几个热门数据库产品？要注意事项及优惠？

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