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  • Overview
  • How to proceed?
  • Notes
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WindowsLinuxUniversal Windows 10 AppJavaReports and QueriesUser code (UMC)
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Stored procedures
Creating an update query
Overview
An Update query (corresponding SQL statement UPDATE) is used to modify records in a database file.
To perform this modification, the main characteristics of the query are as follows:
  • the file in which the data will be modified.
  • the items in which the values will be modified.
  • the selection conditions of the records (customers who live in Seattle, products whose price is greater than 40 Dollars, ...).
See Selection conditions of a query for more details.
For example, customer #45762 has got married. Her title and her last name have been modified.
Update query
The query editor automatically generates the SQL code of this query.
To see the SQL code of a query:
  1. Display the popup menu of the query graph.
  2. Select "SQL code".
You also have the ability to press [F2].
In our example:
UPDATE
CUSTOMER
SET
Title = 'Mrs',
CustomerName = 'VAUVERT'
WHERE
Customer.CustomerNum = 45762

Important

Reports & Queries cannot be used to create update queries.
How to proceed?
To create a new update query:
  1. Select "File .. New .. Query". The wizard for query creation starts.Click New among the quick access buttons.
    • Click "Queries" in the wheel that is displayed. The window for creating a new element is displayed: click "Queries".
    • The wizard for query creation starts.
  2. Specify that you want to create an update query ("Update" option).Specify that you want to create an update query ("Update" option).
  3. If your project is linked to no analysis, specify the analysis to which the query must be attached.
    Go to the next wizard step.
  4. Select the data file in which the data will be modified.
    Go to the next wizard step.
  5. For each item whose value must be modified, click the "Value/Parameter" column. A window allows you to select the value or the parameter to modify.
  6. Specify the value or the parameter containing the value to modify. The values to modify can correspond to:
    • the default value defined in the analysis.
    • a value that must be specified. Specify this value.
    • a value contained in a parameter. Specify the name of the parameter.
    • a null value.
  7. Validate your choice.
  8. Repeat the operations 5 to 7 for each item containing a value that must be modified.
  9. Define the selection conditions. Click the "Condition" column of the relevant items. See Selection conditions of a query for more details.
    Go to the next wizard step.
  10. Specify (if necessary) the sequence of the selection conditions with the conditional AND and OR AND operators:
    • Conditional AND operator: the selected records will match both conditions. For example, the customers whose name starts with the letter "A" AND who live in Denver.
    • Conditional OR operator: the selected records will match one of the two conditions or both conditions. For example, the query selects the customers who live in Seattle OR in Denver.
      Go to the next wizard step.
  11. Type the name of the query (name of the ".WDR" file corresponding to the query). This name will be used to identify the query in your programs.
  12. Specify the caption of the query by briefly describing the purpose of the query. This caption will be used in the project documentation.
    Note: The query name is automatically defined from the caption typed.
  13. Validate the description of the query. The graphic representation of the query is automatically displayed in the query editor.
Notes
  • You have the ability to modify all the characteristics of a query ("Update query .. Query description"). See Description of a query for more details.All the characteristics of a query can be modified: on the "Query" pane, in the "Edit" group, click "Description". See Description of a query for more details.
  • To generate the SQL code corresponding to this query, select "Update query .. SQL code". If modifications are performed in the description of the query, these modifications will be automatically carried over into the corresponding SQL code.To generate the SQL code corresponding to this query, select "SQL code" from the popup menu of the query. If modifications are performed in the description of the query, these modifications will be automatically carried over into the corresponding SQL code.
  • You also have the ability to create a query from one or more files described in the data model editor: to do so, Drag and Drop the selected files from the "Analysis" pane to the query editor.
  • The test of the created query can be run from the query editor. See Running the test of a query for more details.
See also
Minimum required version
  • Version 9
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