Index Table: Index Tables are created to create index over the fields in data stores which are frequently referenced by queries. Creating indexes can improve the query performance in database by allowing applications to locate the data quickly to retrieve from a data store. This is done at the cost of additional writes and storage space to maintain the index data structure. Index Key: The key which is used to uniquely identify the index table is referred as Index Key. Index key can have null as its value. The index is a small database which hare sorted by key values.

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Apply Normalization A table with the students and their grades in different topics. UnitID | StudentID | Date TutorID | Topic Room | Grade Book 5 U2 U1 U5 U4 St1 St1 St4 St2 St2 23.02.03 Tut1 18.11.02 Tut3 23.02.03 Tut1 05.05.03 Tut3 04.07.03 Tut5 GMT 629 Gln 631 5.1 4.7 GMT 629 4.3 PhF 632 AVQ 621 4.9 5.0 Deumlich Zehnder Deumlich TutEmail tut1@fhbb.ch tut3@fhbb.ch tut1@fhbb.ch Dümmlers tut3@fhbb.ch Swiss Topo tut5@fhbb.ch

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Chapter 3, Problem 26RQ

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Index Table:

Index Tables are created to create index over the fields in data stores which are frequently referenced by queries. Creating indexes can improve the query performance in database by allowing applications to locate the data quickly to retrieve from a data store. This is done at the cost of additional writes and storage space to maintain the index data structure.

Index Key:

The key which is used to uniquely identify the index table is referred as Index Key. Index key can have null as its value. The index is a small database which hare sorted by key values.

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Apply Normalization A table with the students and their grades in different topics. UnitID | StudentID | Date TutorID | Topic Room | Grade Book 5 U2 U1 U5 U4 St1 St1 St4 St2 St2 23.02.03 Tut1 18.11.02 Tut3 23.02.03 Tut1 05.05.03 Tut3 04.07.03 Tut5 GMT 629 Gln 631 5.1 4.7 GMT 629 4.3 PhF 632 AVQ 621 4.9 5.0 Deumlich Zehnder Deumlich TutEmail tut1@fhbb.ch tut3@fhbb.ch tut1@fhbb.ch Dümmlers tut3@fhbb.ch Swiss Topo tut5@fhbb.ch

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