Basic Queries


For this and many of the following problems you will create queries that retrieve the relevant information from the Portal small mammal survey database. Download the data. As you begin to familiarize yourself with the database you will need to know some details regarding what is in this database in order to answer the questions. For example, you may need to know what species is associated with the two character species ID or you may need to know the units for the individual’s weight. This type of information associated with data is called metadata and the metadata for this dataset is available online at Ecological Archives.

  1. Write a query that displays all of the records for all of the fields (*) in the main table. Save it as a view named all_survey_data.
  2. We want to generate data for an analysis of body size differences (using both weight and hind foot length) between males and females of each species. We have decided that we can ignore the information related to when and where the individuals were trapped. Create a query that returns all of the necessary information, but nothing else. Save this as size_differences_among_sexes_data.
[click here for output] [click here for output]