sql server - SQL Query to retrieve last transactional date from the database -

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This is my problem I want to write a query to get the last transaction date less than the selected date from the database I am As it stands, but it will only work if the user selects the current date. If the user fails it fails. This is my query importer = @ importer and product = @ product

@importer and 

  as the maximum deadline (Dated record). The parameters that are sent to the query are  @ Products  parameters.

Where is the selected date? Which of the parameters represents the selected date? I think your query is quite fine. You have not yet added the selected date parameter 

  to the maximum (date_convert) from the importer / reconstruction form as the lastest stack, where the importer = @ importer and product = @ product and date record and lieutenant; @selectedDate

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