David M. Kroenke and David J. Auer Database Processing: SQL for ...

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Embedding SQL in Program Code• SQL can be embedded in triggers, stored procedures,and program code.• Problem: assigning SQL table columns with programvariables.• Solution: object-oriented programming, PL/SQL.• Problem: paradigm mismatch between SQL andapplication programming language:– SQL statements return sets of rows; an application works on onerow at a time.• Solution: process the SQL results as pseudo-files.KROENKE AND AUER - DATABASE PROCESSING, 11th Edition© 2010 Pearson Prentice Hall7-42
Triggers I• A trigger is a stored program that is executed by theDBMS whenever a specified event occurs on a specifiedtable or view.• Three trigger types:BEFORE, INSTEAD OF, and AFTER:– Each type can be declared for Insert, Update, and Delete.– Resulting in a total of nine trigger types.• Oracle supports all nine trigger types.• SQL Server supports six trigger types (only for INSTEADOF and AFTER triggers).KROENKE AND AUER - DATABASE PROCESSING, 11th Edition© 2010 Pearson Prentice Hall7-43
Page 1 and 2: David M. Kroenke and David J. AuerD
Page 3 and 4: Chapter Objectives• To gain an un
Page 5 and 6: Application Requirements• View Ri
Page 7 and 8: SQL DDL and DMLKROENKE AND AUER - D
Page 9 and 10: CREATE TABLE• CREATE TABLE statem
Page 11 and 12: Data Types:Oracle Database 11g Data
Page 13 and 14: Data Types:MySQL 5.1Data Types IIKR
Page 15 and 16: Creating RelationshipsKROENKE AND A
Page 17 and 18: Default Values and Data Constraints
Page 19 and 20: ALTER Statement• ALTER statement
Page 21 and 22: Adding and Dropping Constraints•
Page 23 and 24: SQL DML—INSERT• INSERT command:
Page 25 and 26: SQL DML—DELETE• DELETE command:
Page 27 and 28: Using Aliases• Use of aliases:SEL
Page 29 and 30: VRG Data—CUSTOMER IIKROENKE AND A
Page 31 and 32: VRG DataCUSTOMER_ARTIST_INTKROENKE
Page 33 and 34: VRG Data—WORK IIKROENKE AND AUER
Page 35 and 36: VRG Data—TRANS IIKROENKE AND AUER
Page 37 and 38: Result of Outer JoinKROENKE AND AUE
Page 39 and 40: SQL ViewsKROENKE AND AUER - DATABAS
Page 41: Updateable ViewsKROENKE AND AUER -
Page 45 and 46: Firing Triggers• When a trigger i
Page 47 and 48: KROENKE AND AUER - DATABASE PROCESS
Page 49 and 50: Stored Procedures• A stored proce
Page 51 and 52: KROENKE AND AUER - DATABASE PROCESS
Page 53 and 54: Triggers vs. Stored ProceduresKROEN

David M. Kroenke and David J. Auer Database Processing: SQL for ...

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