Oracle索引是数据库性能优化的重要手段。本书是关于索引类型和索引设计的经典参考,详细讲述了各种索引的应用和实现方式,是每位开发者必备的资源。
Oracle Indexing Techniques A Comprehensive Guide
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Oracle分区方法:
范围分区: 依据某个值的范围对数据表进行分区,决定数据存储在何处。
散列分区: 通过指定分区编号均匀分布数据,以确保分区大小一致。
列表分区: 当需要明确控制行映射到分区时,使用列表分区方法。
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范围-列表分区: 结合范围和列表技术,首先进行范围分区,然后在每个范围分区内使用列表分区进行再分区。
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很好很强大! 这本指南深入解析 Oracle 应用开发 的各个方面。通过详细的示例和实用技巧,开发者可以有效提升自己的技术水平。
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数据查询语言(Data Query Language, DQL)
SELECT
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WHERE 子句:用于过滤结果集,只返回满足条件的记录。
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