saphenous-vein
发表于 2025-3-28 15:48:55
Gary Lock,Brian Leigh Molyneauxnow the records’ layout in order to “decode” the contents of each block. The layout is an example of metadata. This chapter examines the kinds of metadata supported by a database engine, their purpose and functionality, and the ways that the engine stores metadata in the database.
modest
发表于 2025-3-28 22:16:37
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Proclaim
发表于 2025-3-28 23:00:11
Institute of Social Studies, The Hagueinto a relational algebra query tree. This chapter examines the basic planning process. It examines what the planner needs to do to verify that an SQL statement is semantically meaningful and looks at two rudimentary plan-construction algorithms.
减至最低
发表于 2025-3-29 07:00:44
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确定
发表于 2025-3-29 09:49:26
Asian Industrial Women Workers in the 1980s. is a file that allows the database engine to locate such records quickly, without having to search through the entire table. This chapter considers three common ways to implement an index: static hashing, extendable hashing, and B-trees. It then develops new relational algebra operations that take
fleeting
发表于 2025-3-29 12:13:33
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JOG
发表于 2025-3-29 15:52:05
(Re)Visualizing History in Toni Morrison’s very efficiently and has no need for additional buffers. On the other hand, the materialized implementation of the sort operator merges several runs at a time and needs a buffer for each. This chapter considers the various ways in which operator implementations can use additional buffers, and gives
口诀法
发表于 2025-3-29 23:42:17
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宣誓书
发表于 2025-3-30 03:29:10
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LURE
发表于 2025-3-30 07:34:22
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