A SQL Server technology that supports the creation, management, and delivery of both traditional, paper-oriented reports and interactive, web-based reports.
To set a date range parameter to include all dates in SSRS, you can use a query to automatically find the earliest and latest dates in your database. First, create a new dataset in your report that pulls the minimum and maximum dates from your table using a query like SELECT MIN(DateColumn) AS MinDate, MAX(DateColumn) AS MaxDate FROM YourTable. Next, open the properties for your start date parameter, go to the default values tab, choose to get values from a query, and select the minimum date field. Do the same for your end date parameter, but select the maximum date field as the default value instead. This should make the report automatically select the widest possible date range every time it runs.
Another potential approach is to have date parameters blank. To do this, open the parameter properties for both your start and end dates and check the box that allows null values. Then, must update the main dataset query for your report to ignore the date filter if no date is chosen. You can write your filter clause like WHERE (@StartDate IS NULL OR DateColumn >= @StartDate) AND (@EndDate IS NULL OR DateColumn <= @EndDate).
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hth
Marcin