Class viii ch-4 working with queries
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The document discusses various database concepts in Microsoft Access including relationships between tables, creating select queries using the query design grid, building forms to enter and display data, generating reports from tables, and careers related to database administration. It provides step-by-step instructions on linking tables using primary and foreign keys, designing select queries, building basic forms, and generating simple reports from tables in Access.
Class viii ch-4 working with queries
- 1. Ch-4 Working with Queries Made by: Sandhya Jeswani Panjwani 1
- 2. 1. Relationships & Linking Tables 2. Query & its types 3. Creating a Select Query Contents 4. Forms & its views 5. Creating a Form 6. Working with Reports 7. Let’s Know more 8. Career in IT 2
- 3. Relationships are links between the tables. Relationship works by matching data in key fields (a field with the same name in both the tables). These matching fields are the Primary key from one table and a Foreign key in other table. Relationship between Tables Foreign key is a value in one table that must match the Primary key in another table. Example:- The given tables can be linked using Roll No field. After creating relationships, you can create queries, forms and reports to display information from several tables at once. After working with relationships, you must delete the relationship before you make changes to the fields on which Relationship is based (Ex-Roll No fields). To delete relationships, select the Link line Press DELETE key. 3
- 4. Linking Tables (Making Relationships) 1) Open one of the table Click Database Tools tab in Show/Hide group click Relationships button. 2) Show table dialog box opens Select Students Personal Record table click Add Select Result table click Add click Close button 3) Drag the Primary key of the parent table over the Foreign key in Child table (Roll No). Parent Table Child Table 4) A link line will join the tables Edit Relationships dialog box opens click Create button. 4
- 5. Query A Query is like a simple question that displays specific records from a table that meet a certain criteria. Example, who lives in Gwalior, Who is Fail in Exam etc. ? ? Accessprovidesfourtypesofqueries:SelectQuery,UpdateQuery,CrosstabQuery,AppendQuery. Creating Select Query We can create Select Query by using: 1) Query Design option, 2) Query Wizard. Creating Select Query using ‘Query Design’ 1) Open the Result table. 5
- 6. 5) Double click the field names to add them to ‘Query Design grid.’ Or Drag the field names from field list to query design grid to add them. YoucansavethequeryforfutureusealsobypressingCTRL+S. Creating Select Query using ‘Query Design’ Field List Query Design Grid 6) You can apply sort also. Type the condition in the Criteria row of the required field. =“Fail”>60 7) Run the query from Design tab to see its result. 6
- 7. Forms A form resembles a fill-in-the-blanks sheet. It is a way to enter data into a database. Access links the form to the table and stores the information of the form into the table. Data can be inserted, updated and deleted from a table using a form. Three View of the Forms 1) Form View (by default) 2) Layout View 3) Design View 7
- 8. Creating a Form 1) Open the Students Personal Record table. 2) 3) The form opens in Layout view. 4) Use Format tab to change its appearance. 5) To edit/enter data in the form, Open form in Form View. New(blank)Recordbutton,to enternewdata.8
- 9. Report 1) Open the Students Personal Record table. 2) 3) Use Format tab to change its appearance print it. A Report is an effective way to present your data in a printed format. To create a report:- 9
- 10. Career in IT A Database Administrator designs, implements and maintains the database system in an organization. How to become:- Bachelor’s degree in Computer Science/Information Technology. Skills:- Knowledge of database theory and design along with RDBMS (Access, MySQL), Logical reasoning, critical thinking, strong problem solving skills. 10