ACC: Updating a Table from a Second Table Using an Expression

ID: Q103269

The information in this article applies to:

SUMMARY

Novice: Requires knowledge of the user interface on single- user computers.

This article describes how to create a query that uses an expression to update a record in one table with data from another table.


MORE INFORMATION

The sample query below adds data from the Current Week table to the records in the Yearly Rainfall table.

NOTE: This type of query does not work if the data being added is the result of a totaling or grouping.

  1. Create a new table with the following fields and save it as Yearly Rainfall: 
    
      City      Inches   Last Updated
      -------------------------------
      Baroda     0.5     4/2/93
      Basildon  22.0     4/2/93
      Beaver    18.0     4/2/93


  2. Create a new table with the following fields and save it as Current Week: 
    
      City      Inches   Week Of
      --------------------------
      Baroda     0.1     4/9/93
      Basildon   2.0     4/9/93
      Beaver     2.5     4/9/93


  3. Create a new query based on the tables Yearly Rainfall and Current Week. Join the tables on the City field.


  4. On the Query menu, click Update.


  5. Drag the Last Updated and Inches fields from the Yearly Rainfall table to the query grid.


  6. Create the following entries in the Update To row of the query grid: 
    
      Field: Last Updated
         Table: Yearly Rainfall
         Update To: [Current Week].[Week Of]
      Field: Inches
         Table: Yearly Rainfall
         Update To: [Yearly Rainfall].[Inches]+[Current Week].[Inches]


  7. Save and then run the query. 
    
   The data in the table Yearly Rainfall is now:

      City      Inches     Last Updated
      ---------------------------------
      Baroda     0.6       4/9/93
      Basildon  24.0       4/9/93
      Beaver    20.5       4/9/93



REFERENCES

For more information about update queries, search the Help Index for "update queries," or ask the Microsoft Access 97 Office Assistant.

Additional query words: total archive history 


Keywords          : QryMktbl 
Version           : 1.0 1.1 2.0 7.0 97
Platform          : WINDOWS 
Issue type        : kbinfo

Last Reviewed: March 26, 1999