Chapter 23: Labor Law. Industrial Relations Spring Econ 4490 Blaw 4490 Mgt 4490 2.
ODBC the theMIDDLEWAREthatCONNECTS! Presented by Carter-Davis-Wagner CSIS 4490 - Spring 2002 Dr....
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Transcript of ODBC the theMIDDLEWAREthatCONNECTS! Presented by Carter-Davis-Wagner CSIS 4490 - Spring 2002 Dr....
ODBCODBC thethe
MIDDLEWAREMIDDLEWARE thatthat
CONNECTS!CONNECTS!
Presented byCarter-Davis-WagnerCSIS 4490 - Spring 2002 Dr. Hoganson
Conceptual Office Layout at Bob’s Bikes
PC at front counter
PC at loading dock
PC in Bob’s office
Server in back office
LAN
How does it connect?
Clients
LAN Server(s)
FirewallInternet
ODBC layer
ODBC - Open DataBase Connectivity - from Microsoft
•Provides interface•Provides interface to MySQL Database to access the tables for Bob’s Bike Shop using ActiveX
•Interfaces with Word to create form letters with MSQuery
•Interfaces with Excel to extract data to create charts and graphs using VBA
•Also may interface with
•PowerPoint
•Access Database
•Products from other Vendors
Bob’s Bike Shop Inventory SystemSpecifications
Server Client 1 P100 server IBM ThinkPad 48MB RAM Windows 95 SCSI Hard Drive Windows NT 4.0 Workstation Client 2 DHCP Addressing IBM ThinkPad Windows 2000 ProfessionalHub 3Com Model TP4 Database 4 Ports MySQL http://www.mysql.org MySQL ODBC Driver Cable Category 5 Software Visual Basic MS Excel MS Word
ODBC Configuration
MySQL has a click and go setup program to install ODBC Drivers
Configure the drivers to access the data
•Data Set Name•Location (IP address or server name)•Database name•User ID and password (as required)
Table Statements
use csis4490;
create table inventory (model char(10) Not Null, color char(10) Not Null, size int(11) Not Null Default 0, gender char(1) Not Null, instock int(11) Default 0, onorder int(1) Not Null, manid int(9) Not Null Default 0, invid int(9) Not Null Auto_Increment,Primary Key (invid), Unique id (invid),FOREIGN KEY(manid) REFERENCES manufacturer(manid) )
create table manufacturer (company char(25) Not Null, address1 char(25) Not Null, address2 char(25),city char(15) Not Null, state char(12) , country char(12) Not Null, mailcode char(12), contact char(25), phone char(12), email char(30),manid int(9) Not Null Auto_Increment, Primary Key (manid), Unique id (manid) )
Word: Fields that are extracted from the database
The fields in << >> are extracted from the database for use in the form letter.
Excel: Data can be also be accessed using code (VBA).
‘select DSNconString = "DSN=csis4490"‘connectthisconn = SQLOpen(conString, , 2)If IsError(thisconn) Then Error 9999 'invalid response from servermysql$ = "select model, color, size, instock from inventory"'send querySheets("Status").Range("b4") = sqlexecquery(thisconn, StringToArray(mysql$))‘save error (if any)Sheets("Status").Range("b17") = sqlerror()‘define destination cell for each field retrievedSheets("Status").Range("b5") = sqlbind(thisconn, 1, Sheets("Data").Range("a6"))Sheets("Status").Range("b19") = sqlerror()Sheets("Status").Range("c5") = sqlbind(thisconn, 2, Sheets("Data").Range("b6"))Sheets("Status").Range("b21") = sqlerror()