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Chapter 4: SQL

Chapter 4: SQL. Basic Structure Set Operations Aggregate Functions Null Values Nested Sub-queries Derived Relations Views Modification of the Database Joined Relations Data Definition Language Embedded SQL, ODBC and JDBC. Schema Used in Examples. Basic Structure .

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1.21k views • 98 slides

Index Tuning

Index Tuning. Index. An index is a data structure that supports efficient access to data. Set of Records. Matching records. Condition on attribute value. index. (search key). Performance Issues. Type of Query Index Data Structure Organization of data on disk Index Overhead

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624 views • 35 slides

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Chapter 4: SQL

Index Tuning