เพ มภาพตามเน อหาของแต ละบท. MS-Access. by Asst. Prof. Wassanaa Naiyapo adapted into English by Dr. Prakarn Unachak IT AND MODERN LIFE

Transcription

1 เพ มภาพตามเน อหาของแต ละบท MS-Access by Asst. Prof. Wassanaa Naiyapo adapted into English by Dr. Prakarn Unachak IT AND MODERN LIFE

2 MS-Access Database Basics & Table 7.2 Form 7.3 Query 7.4 Report 7.5 Working with Multiple Tables IT AND MODERN LIFE

3 7.3 Query IT AND MODERN LIFE 3

4 7.3 Query (1) Working with Query (2) Creating a Query IT AND MODERN LIFE 4

5 (1) Working with Query Form Query Report Student MYStudent.accdb IT AND MODERN LIFE 5

6 (1) Working with Query (cont.) Tables Where data are stored. A table consists of rows (records) and column (types of fields) Forms User-created interface for easy & quick data entry and editing. Reports User-created display of data. Queries User-defined filter of data. How you ask database questions. In effect, queries help you search for the data you want 6

7 (1) Working with Query (cont.) Query is the tool that Microsoft Access has provide us to ask and view only the data that match our criteria (the conditions of the data we want) for example, from Student table, we might want to view only students with GPA less than 2.0. We can create a query to do that IT AND MODERN LIFE 7

8 (2) Creating a Query There are 2 ways to create a query Create tab Queries group (1) Query Wizard create a query by following step-by-step guide (2) Query Design create a query where you will specify the criteria, which fields will be displayed, and in what order IT AND MODERN LIFE 8

9 (2.1) Query Wizard Still using MyStudent database, with Student table To create a query using Query Wizard, follow these steps: 1. Click Create tab Select Query Wizard Query Wizard will appear 2. Select Simple Query Wizard 3. Click OK IT AND MODERN LIFE 9

10 (2.1) Query Wizard (cont.) We will be move to Simple Query Wizard dialog 4. Do the following: 4.1 Click to select data source. For his example, we select Table: Student 4.2 Select the field we need for the query, or to display, then click > Or click to use all fields. Remove field already selected by click or to remove all of them In this example, we select all fields idstudent, title, firstname, lastname, address, Click Next IT AND MODERN LIFE 10

11 (2.1) Query Wizard (cont.) Next step, select to show Detail or just Summary For this example, select Detail then click Next IT AND MODERN LIFE 11

12 (2.1) Query Wizard (cont.) Next, you will be ask to name the query, and select where to go next after the query is created. 5. Do the following steps. 5.1 Name the query (Student Query is the default name, where you can change it) 5.2 Select Open the query to view information to view the result of the query 5.3 Click Finish IT AND MODERN LIFE 12

13 (2.1) Query Wizard (cont.) The result (same as the table at the moment): IT AND MODERN LIFE 13

14 (2.2) Query Design This will create query from the Design view, where we can select fields to show/use and criteria to limit record that appear (matching the criteria only) 1. Still using Student table 2. Do the following steps: 2.1 Click Create tab 2.2 Click Query Design IT AND MODERN LIFE 14

15 (2.2) Query Design (cont.) 3. Select table by doing the followings: 3.1 Identify the data source. Click Table tab for now. 3.2 Click Student Click Add button 3.4 The click Close button IT AND MODERN LIFE 15

16 (2.2) Query Design (cont.) Query Design View will appear 4. Select the field we want to use and/or display by double click them in the table, or click the expand button in the Field: box IT AND MODERN LIFE 16

17 (2.2) Query Design (cont.) For example, we want the following fields: idstudent title firstname lastname address GPA allowance 5. Make sure you select all the fields we need At Show, the symbol means that the field will be shown in the query IT AND MODERN LIFE 17

18 (2.2) Query Design (cont.) 6. We will start with simple criteria 6.1 At Show means that field will be display in the query result (what you want to see). Check idstudent, title, firstname, lastname, and GPA 6.2 At Criteria. We want to see male student, so we will be Mr. at the criteria box of title Click Run to see the result IT AND MODERN LIFE 18

19 The result: (2.2) Query Design (cont.) Compare to the complete table IT AND MODERN LIFE 19

20 Criteria (2.2) Query Design (cont.) For numerical field such as Number or Currency you can use comparison =, <>, >, <, >=, <=, for example >= <> 5 For text field such as Short Text or Long Text Use quotation mark (" ) over the value to compare, for example: Mathematics" "105/2 Phaholyothin Rd." 20

21 (2.2) Query Design (cont.) Criteria (cont.) Comparison and logic operator >, <, =, >=, <=, <>, NOT, AND, OR Field name [table name].[field name] For example: Student.firstName 21

22 Criteria - Wildcards A* Every data starting with A *A Every data ending with A *A* Every data ending with A at any location A?? Every data with the length of 3 characters First one must be A, the other 2 can be anything Field name: Fname Table: Employee Sort : Show : Criteria: A* or B* or C* Find a record with Fname starts with A or B or C Field name: Fname Position Table: Employee Employee Sort : Show : Criteria: A* Sale Find a record with Fname starts with A and has Position of Sale Question: Table: Student Field name: title M* M?? Same/different results? IT AND MODERN LIFE 22

23 Criteria Field name: idstudent title firstname lastname GPA Table: Student Student Student Student Student Sort : Show : Criteria: Ra* Result At lastname field Criteria, try: 1. *ra* 2. ra* 3. ra How different are the results? IT AND MODERN LIFE 23

24 Field name: idstudent title firstname lastname GPA Examples Table: Student Student Student Student Student Sort : 1. Show : Criteria: Mr. >3.0 Result 2. Field name: idstudent title firstname lastname GPA Table: Student Student Student Student Student Sort : Show : Criteria: <3.0 AND > 2.0 Result 3. Field name: idstudent title firstname lastname GPA Table: Student Student Student Student Student Sort : Show : Criteria: >3.0 or: < IT AND MODERN LIFE 24

25 Result for IT AND MODERN LIFE 25

26 7.3 Query Conclusion We have learned how to create queries With Query Wizard And on your own with Query Design If we want to know something about the data in the database, a query is a powerful tools for you to find the answer. Notice: Make sure your query is correct. What you tell MS Access to do, and what you think you tell MS Access to do maybe two different things IT AND MODERN LIFE 26