数据库系统概念(database system concepts)英文第六版 课后练习题 答案 第11章
Figure11.1PseudocodeforfindIteratorandtheIteratorclassChapter11IndexingandHashing8delete(valueKl)beginj=firstihigh-orderbitsofh(Kl);deletevalueKfrombucketj;lcoalesce(bucketj);endcoalesce(bucketj)begini=bitsusedinbucketj;jk=anybucketwithfirst(i−1)bitssameasthat...
Chapter 11: Indexing and Hashing Database System Concepts, 6th Ed. ?Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use Chapter 12: Indexing and Hashing ? Basic Concepts ? Ordered Indices ? B+-Tree Index Files ? B-Tree Index Files ? Static Hashing ? Dynamic ...
C HA P TER11Indexing and HashingPractice Exercises11.1Answer: Reasons for not keeping indices on every attribute include:• Every index requires additional CPU time and disk I/O overheadduring inserts and deletions.• Indices on non-primary keys might have to be changed on updates,although an...
Storage and File Organization Indexing and Hashing Query Processing Query Optimization Concurrency Control - lock-based protocols Recovery - log-based mechanisms Project – MiniSQL 三、Advanced Database Technology Parallel Databases Distributed Databases ...
databasedesignatthelogicallevelnInstance–theactualcontentofthedatabaseataparticularpointintimelAnalogoustothevalueofavariablenPhysicalDataIndependence–theabilitytomodifythephysicalschemawithoutchangingthelogicalschemalApplicationsdependonthelogicalschemalIngeneral,theinterfacesbetweenthevariouslevelsandcomponents ...
Indexing and Hashing Query Processing Query Optimization Concurrency Control - lock-based protocols Recovery - log-based mechanisms Project – MiniSQL 三、Advanced Database Technology Parallel Databases Distributed Databases Information Retrieval and Web Search ...
After an introductory part, it presents indexing techniques in detail, going far beyond classic university lectures (for example, it does not limit itself to hashing and B-trees). The presentation of each technique follows a defined schema: introduction to the technique, operation (like insert/...
Tuesday January 27 Ch. 14 [14] Indexing and Hashing Thursday January 29 Ch. 15 [15] Query Processing Tuesday February 3 Ch. 15 [16] Query Processing Thursday February 5 Ch. 16 [16] Query Processing Tuesday February 10 MIDTERM (in class) ...
Chapter6:IntegrityandSecurity Chapter7:RelationalDatabaseDesign PART4DATASTORAGEANDQUERYING Chapter11:StorageandFileStructure Chapter12:IndexingandHashing Contents DataModel: Isacollectionofconceptualtoolsfordescribing Data, Datarelationships, Datasemantics,and ...