A query is a request made to a database to extract specific information such as details of all personnel over a certain age. Queries can be simple, using wildcard searches, or complex to interrogate the database and retrieve desired data. Creating a database allows for organizing and storing information that can then be queried.

1. QUERY Creating a database

2. What is a QUERY?

3. What is a QUERY? Refer to as searching / interrogating a database. Involves extracting information from the database. Eg: Request of a database to list the details of all personnel over a certain age.

4. Simple Query

5. Simple Query

6. Wildcard searches

7. Complex searches