Chapter 7 Query-by-Example Transparencies © Pearson Education Limited 1995, 2005 2 Chapter 7 - Objectives The main features of Query-By-Example (QBE). The types of queries provided by the Microsoft Access DBMS QBE facility. How to use QBE to build queries to select fields and records. How to use QBE to target single or multiple tables. © Pearson Education Limited 1995, 2005 3 Chapter 7 - Objectives How to perform calculations using QBE. How to use advanced QBE facilities including parameter, find matched, find unmatched, crosstab, and autolookup queries. How to use QBE action queries to change content of tables. © Pearson Education Limited 1995, 2005 4 Query-by-Example (QBE) Visual approach for accessing information in a database through use of query templates. Example values are entered into template to represent what access to database is to achieve, such as the answer to a query. Originally developed by IBM in 1970s and has proved so popular that QBE (or similar) is now provided by most DBMSs. When user constructs a QBE - in background, DBMS creates an equivalent SQL statement. © Pearson Education Limited 1995, 2005 5 Query-by-Example (QBE) Allows user to: - Ask questions about data in one or more tables. - Specify the fields we want in the answer. - Select records according to some criteria. - Perform calculations on the data in tables. - Insert and delete records. - Modify values of fields. - Create new fields and tables. © Pearson Education Limited 1995, 2005 6 Introduction to Microsoft Access © Pearson Education Limited 1995, 2005 7 Summary of Microsoft Access Query Types © Pearson Education Limited 1995, 2005 8 Introduction to Microsoft Access Queries © Pearson Education Limited 1995, 2005 9 Building Select Queries using QBE - Specifying Criteria © Pearson Education Limited 1995, 2005 10 Building Select Queries using QBE - Specifying Criteria © Pearson Education Limited 1995, 2005 . Chapter 7 Query-by-Example Transparencies © Pearson Education Limited 1995, 2005 2 Chapter 7 - Objectives The main features of Query-By-Example (QBE). The types. to use QBE action queries to change content of tables. © Pearson Education Limited 1995, 2005 4 Query-by-Example (QBE) Visual approach for accessing information in a database through use of. background, DBMS creates an equivalent SQL statement. © Pearson Education Limited 1995, 2005 5 Query-by-Example (QBE) Allows user to: - Ask questions about data in one or more tables. - Specify