在探索关系型数据库的查询优化技术时，我们经常会遇到各种Join操作，它们是构建复杂查询的基础。在这些Join操作中，Semi ...

Cryptography aficionados, say hello to a new hash algorithm backed by the National Institute for Standards and Technology (NIST). Dubbed Keccak (pronounced "catch-ack"), the secure hash algorithm, ...