Twitter的snowflake算法:Github 地址:https://github.com/twitter-archive/snowflake。 美团的Leaf分布式ID生成系统:Leaf 是美团开源的分布式ID生成器,能保证全局唯一性、趋势递增、单调递增、信息安全,里面也提到了几种分布式方案的对比,但也需要依赖关系数据库、Zookeeper等中间件。感觉还不错。美团技术团队的一篇文章:...
'31-MAY-2014'; 14-JAN 14-FEB 14-MAR 14-APR 14-MAY 14-JUN • Relevant Partitions are known at compile time – Look for actual values in PSTART/PSTOP columns in the plan • Optimizer has most accurate information for the SQL statement Copyright © 2014, Oracle and/or its ...
With theUPDATEstatement, you can change the actual data in existing rows in a table. Unlike theALTERDDL command that changes the underlying structure or naming of database objects, theUPDATEstatement will alter the actual row-level data. You can qualify anUPDATEcommand with aWHEREstatement to cha...
Twitter的snowflake算法:Github 地址:https://github.com/twitter-archive/snowflake。 美团的Leaf分布式ID生成系统:Leaf 是美团开源的分布式ID生成器,能保证全局唯一性、趋势递增、单调递增、信息安全,里面也提到了几种分布式方案的对比,但也需要依赖关系数据库、Zookeeper等中间件。感觉还不错。美团技术团队的一篇文章:...