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Web Databases

Web Databases. David Kim. Index. What is a Database? File System vs. DBMS Database Models Database Modeling Databases SQL DBC Choosing a database IA & DB Conclusion References. What is a Database ?. A very large, integrated collection of data

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Web Databases

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  1. Web Databases David Kim David Kim

  2. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a database • IA & DB • Conclusion • References David Kim

  3. What is a Database ? • A very large, integrated collection of data • A collection of information stored in a computer in a systematic way • DBMS (= Database Management System) - A software used to manage and query a database David Kim

  4. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a database • IA & DB • Conclusion • References David Kim

  5. FMS vs. DBMS David Kim

  6. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a database • IA & DB • Conclusion • References David Kim

  7. Database Models 1 data modelingcapacity Object-relational model (late ’90s) Object-oriented model (mid ’90s) Relational model(late ’80s) Hybrid model(mid ’80s) File System(before ’70s) data managementfacilities * adapted from the material in http://www.ktdata.co.kr/ktdata/kthome7/zeus_5.htm David Kim

  8. Database Models 2 Database Model: a collection of logical constructs • flat (or table) model ☞ • hierarchical model ☞ • network model ☞ • relational model ☞ • object-oriented model ☞ • object/relational (= post-relational) model ☞ David Kim

  9. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a database • IA & DB • Conclusion • References David Kim

  10. ER Model ID Name ORDER CUSTOMER Is for Order date Phone # Initiate Order type SSN Quantity Birthday has Discount Is included ITEM PRODUCT ID ID Is part of Description Description consist of Type Price DB Modeling 1 *source: www.fkii.or.kr/data/seminar/uploaded_files/ 유해진%20부장%20(액센츄어).ppt David Kim

  11. DB Modeling 2 Relational Model ORDER CUSTOMER ORDER_ITEM ID Order_date (M) Order_type (M) SSN Name (M) Phone # Birthday Order_ID Item_ID Quantity (M) Discount ITEM PRODUCT ID Description (M) Price (M) PRT_ID ID Description (M) Type *source: www.fkii.or.kr/data/seminar/uploaded_files/ 유해진%20부장%20(액센츄어).ppt David Kim

  12. Supplier_ID Supplier_Name Normalization 1 • 1st Normal Form : (No Repeating Groups) • 2nd Normal Form : ( Non-key Attribute depend on the whole primary key) Customer_ID Child Customer_ID Children1 Comment1 …. ChildrenX CommentX Comment Supplier_ID Part_No City_Name Supplier_ID Part_No City_Name Supplier_Name Part_color Contact_Name Contact_Phone Part_Price Contact_Name Contact_Phone Part_No Part_Color Part_Price *adpated from www.fkii.or.kr/data/seminar/uploaded_files/ 유해진%20부장%20(액센츄어).ppt David Kim

  13. Normalization 2 • 3rd Normal Form : (Non-Key Attributes depend only and fully on primary key) • Boyce-Codd Normal Form(BCNF) • 4NF • 5NF Part_No Part_No Supplier_Name Contact_Name Supplier_Name Part_color Contact_Name Contact_Phone Part_Price Part_Color Part_Price Supplier_Name Contact_Name Contact_Phone *adpated from www.fkii.or.kr/data/seminar/uploaded_files/ 유해진%20부장%20(액센츄어).ppt David Kim

  14. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a database • IA & DB • Conclusion • References David Kim

  15. Databases • Open source Databases • MySQL • PostgreSQL Commercial Databases • MS SQL Server • ORACLE • DB2 • Informix David Kim

  16. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a database • IA & DB • Conclusion • References David Kim

  17. SQL • Structured Query Language: an ANSI standard computer language for accessing and manipulating databases • ANSI SQL: SQL Standard (SQL-92) ☞ • MySQL: MySQL Server • Jet SQL: MS Access ☞ • T-SQL (Transact-SQL) : SQL Server ☞ • SQL*Plus, PL/SQL (Procedural Language/SQL) : Oracle ☞ David Kim

  18. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a Database • IA & DB • Conclusion • References David Kim

  19. Database Providers • ODBC (Open Database Connectivity) ☞ • OLEDB(Object Linking and Embedding DB) ☞ • ADO.NET (ActiveX Data Objects for .NET) ☞ • JDBC (Java Database Connectivity) ☞ Data Consumer Data Provider Data Store SQL Server ASP.NET ADO.NET David Kim

  20. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a Database • IA & DB • Conclusion • References David Kim

  21. Choosing a Database 1 • Desktop or Server Database • OS Environment • Size of the project • Flexibility • Portability • Cost/Budget What else? David Kim

  22. Choosing a Database 2 * source : www.sraapowergres.com/en/ whitepapers/postgres%20vs%20mysql.pdf David Kim

  23. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a database • IA & DB • Conclusion • References David Kim

  24. IA & DB Database Modeler - Coder - Information Architect • IA on the whole project • Front-end UI based on the DB Modeling • Your opinion… David Kim

  25. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a database • IA & DB • Conclusion • References David Kim

  26. Conclusion DBMS is now essential: “Information Architects should know about it!” David Kim

  27. Index • What is a Database? • File System vs. DBMS • Database Models • Database Modeling • Databases • SQL • DBC • Choosing a database • IA & DB • Conclusion • References David Kim

  28. References • Database Models: Hierarcical, Network, Relational, Object-Oriented, Semistructured, Associative and Context. • Database Models • Normalization • eXtropia | Tutorials | Introduction to Databases for the Web | Database Models • Data Modeling: Overview of the Relational Model • DBMS - April 1998 - Modeling Object/Relational Databases • Object-Relational Model • Object-relational database articles and products • Java Database • Overview of ADO.NET • Welcome to FKII • PowerGres • ZEUS/UniSQL - Korea Telecom Data,Inc David Kim

  29. Appendix David Kim

  30. Flat Model • Spreadsheet (e.g. Excel) ☝ David Kim

  31. Hierarchical Model ☝ A B C D E F C1 C2 F1 F2 D1 David Kim

  32. Network Model ☝ Company Customer 1 1 1 M M M Product Payment Invoice 1 1 M M InvoiceLine David Kim

  33. Relational Model 1 David Kim

  34. Relational Model 2 ☝ David Kim

  35. Object-Oriented Model Class Department Student studentsInDept() profInThisDept() printTranscript() studentsInClass() inherit Grad Student ☝ David Kim

  36. Object/Relational Model Relational Model Object-oriented Model Object-relational Model ☝ * material from: http://www.ktdata.co.kr/ktdata/kthome7/zeus_5.htm David Kim

  37. ANSI SQL SQL Data Manipulation Language (DML) • SELECT - extracts data from a database table • UPDATE - updates data in a database table • DELETE - deletes data from a database table • INSERT INTO - inserts new data into a database table SQL Data Definition Language (DDL) • CREATE TABLE - creates a new database table • ALTER TABLE - alters (changes) a database table • DROP TABLE - deletes a database table • CREATE INDEX - creates an index (search key) • DROP INDEX - deletes an index ☝ David Kim

  38. Jet SQL IIF(InStr(si.GEOG_UNIT,',')<>0,MID([si.GEOG_UNIT],1,InStr([si.GEOG_UNIT],',')-1)) $query0 .= ($state && $state != 'state_undet') ? "AND ((si.GEOG_RANK='county' AND IIF(InStr(si.GEOG_UNIT,',')<>0,MID([si.GEOG_UNIT],1,InStr([si.GEOG_UNIT],',')-1)) $sql_op '$state') OR (si.GEOG_RANK='province' AND IIF(InStr(si.GEOG_UNIT,',')<>0,MID([si.GEOG_UNIT],InStr([si.GEOG_UNIT],',')+1)) $sql_op ' $state') OR (si.GEOG_RANK='province' AND IIF(InStr(si.GEOG_UNIT,',')=0,MID([si.GEOG_UNIT],InStr([si.GEOG_UNIT],',')+1)) $sql_op '$state'))":""; ☝ David Kim

  39. Stored Procedure CREATE PROCEDURE prGet_CustomerRowSet @sCustomerID NCHAR(5) AS SELECT CompanyName, ContactName, City FROM Customers WHERE CustomerID = @sCustomerID GO ☝ David Kim

  40. PL/SQL DECLARE qty_on_hand NUMBER(5); BEGIN SELECT quantity INTO qty_on_hand FROM inventory WHERE product = 'TENNIS RACKET' FOR UPDATE OF quantity; IF qty_on_hand > 0 THEN -- check quantity UPDATE inventory SET quantity = quantity - 1 WHERE product = 'TENNIS RACKET'; ELSE INSERT INTO purchase_record VALUES ('Out of tennis rackets', SYSDATE); END IF; COMMIT; END; ☝ David Kim

  41. ADO <%set conn=Server.CreateObject("ADODB.Connection")conn.Provider="Microsoft.Jet.OLEDB.4.0"conn.Open(Server.Mappath("/db/northwind.mdb"))set rs = Server.CreateObject("ADODB.recordset")rs.Open "Select * from Customers", conndo until rs.EOF    for each x in rs.Fields       Response.Write(x.name)       Response.Write(" = ")       Response.Write(x.value & "<br />")     next    Response.Write("<br />")    rs.MoveNextlooprs.closeconn.close%> ☝ David Kim

  42. ADO.NET • Visual Basic Dim nwindConn As SqlConnection = New SqlConnection("Data Source=localhost;" & _ "Integrated Security=SSPI;Initial Catalog=northwind") • C# SqlConnection nwindConn = new SqlConnection("Data Source=localhost;Integrated Security=SSPI;Initial Catalog=northwind"); ☝ David Kim

  43. ODBC • VB Dim nwindConn As OdbcConnection = New OdbcConnection("Driver={SQL Server};Server=localhost;" & _ "Trusted_Connection=yes;Database=northwind") • C# OdbcConnection nwindConn = new OdbcConnection("Driver={SQL Server};Server=localhost;" + "Trusted_Connection=yes;Database=northwind"); ☝ David Kim

  44. OLEDB • VB Dim nwindConn As OleDbConnection = New OleDbConnection("Provider=SQLOLEDB;Data Source=localhost;" & _ "Integrated Security=SSPI;Initial Catalog=northwind") • C# OleDbConnection nwindConn = new OleDbConnection("Provider=SQLOLEDB;Data Source=localhost;Integrated Security=SSPI;Initial Catalog=northwind"); ☝ David Kim

  45. JDBC Class.forName("oracle.jdbc.driver.OracleDriver") Connection con = DriverManager.getConnection( "jdbc:oracle:thin:@dbaprod1:1521:SHR1_PRD", username, passwd); ☝ David Kim

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