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DAY 20: MICROSOFT ACCESS – CHAPTER 3 CONTD. Aliya Farheen [email protected] March 19, 2015. ANNOUNCEMENT • MyITLab Lesson D is due on 4/6/2015 Monday by 11:59 pm. • Based on the Microsoft Word • Consist of seven chapters • Plan yourself to complete before due date. REMINDER • Homework # 4 in Microsoft Access is now available at http://cs101.wvu.edu/instructors/farheen/assignments/ • It is due by 4/3/2015 by 11.59 P.M. • Will have a homework review session in the next class. TOTAL QUERIES • “Totals” in a query can group field values and also perform basic computational functions on them • To make the Total row appear, you need to click the Sigma symbol “Totals” button in query design view ! EXERCISE • Go to the lecture notes page and Download Total_example.accdb. PREMISE We are running an investment firm and have some consultants working for us who have clients for which they manage investments. We want a query that will show us how many clients each consultant has and the total amount of investments each consultant is handling… • Save locally and open Total_example.accdb STRUCTURE OF TABLES & RELATIONSHIP This Database has not yet had a relationship created. We will do it in the query for this one. Sometimes under special circumstances you will create them here instead of in the relationships window. Generally it is done in the relationships window though… BUILDING THE TOTAL QUERY • Create ribbon > Other group > Query Design • Add both tables • Create relationship inside query by dragging ConsultantID fields together BUILDING THE TOTAL QUERY • • • • Add the field [Consultants]LastName Add the field [Clients]LastName Add the field [Clients]Assets Run it without Total options > back to design view • Click the button on the Query Tools / Design ribbon to insert a “Total:” row • Note that the default for each is “Group By” BUILDING THE TOTAL QUERY • We will Group By the last name of the consultants to show each of them singularly • We will Count the last names of the clients as they are tied to the consultants to show how many clients each has ! • We will Sum the assets of the clients to show how much all clients of each consultant have together SETTING UP THE TOTAL ROW • Have [Consultants] LastName as Group By • Have [Clients] LastName as Count • Have Assets as Sum • Run the Query ! ALIASING THE FIELD NAMES • Sometimes for a Field, a Calculated field, or a Total field, we like to make the display name more specific in the query results • To do this, simply change the field name in design view by adding a new name and an “:” • An example for the clients LastName field: # of Clients: LastName ALIAS THE 3 FIELDS IN DESIGN VIEW • • • • Consultant: LastName # Clients: LastName Total Assets: Assets Run the Query and note the field names in the dynaset ! DOING MULTIPLE THINGS TO 1 FIELD • Sometimes you may need to do multiple total query-type actions to a single field. • Download and open the file CSDemo.accdb from the site BACKGROUND FOR TOTAL QUERY • Look at the contents of the Sales table We want to display our: • Number of sales • Total dollar amount of sales • Average dollar amount sale CREATING THE TOTAL QUERY • • • • • Create a new query in design view Add the Sales Table Add the Amount field 3 Times ! ! ! Click button to show the Total row Set them to Count, Sum, and Average • Run it ! • Close Access IMPORTING XML DATA TO TABLES • Download and save Bands.xml file on the desktop • External Data Ribbon > Import group > XML File • Browse for the xml file • Select Open & OK IMPORTING XML FILES • Verify Structure and Data is checked • This brings in the table & its records • Later in the course we will use other options • Click OK and Close • Open the table in the database ! IN CLASS PROJECT • Go to todays lecture notes • Download the data file Save the database file on to computer • Collect the instruction file • Start working on the Queries Project !