## Calculate an expression

 Author Message sistemas_casinomnes SSC Rookie Group: General Forum Members Points: 31 Visits: 124 Hello, I need help to calculate an expression in sql.For example I have to send (248/5)*30 to a store procedure or to a function and the sp or the function has to return me the result, in this case is 1488. Kingston Dhasian Hall of Fame Group: General Forum Members Points: 3001 Visits: 4995 You can use Dynamic SQL to handle the scenarioBut, be really careful about SQL Injection and take necessary steps to avoid it`CREATE PROCEDURE dbo.usp_ShowExpressionResults( @Expression NVARCHAR(MAX))ASBEGIN SET @Expression = 'SELECT ' + @Expression + ' AS Result' EXECUTE sp_executesql @ExpressionEND` Kingston DhasianHow to post data/code on a forum to get the best help - Jeff Modenhttp://www.sqlservercentral.com/articles/Best+Practices/61537/ Phil Parkin SSCrazy Eights Group: General Forum Members Points: 8320 Visits: 19469 sistemas_casinomnes (2/26/2013)Hello, I need help to calculate an expression in sql.For example I have to send (248/5)*30 to a store procedure or to a function and the sp or the function has to return me the result, in this case is 1488.Can you explain why the calculation has to be done in SQL?Here is one way. Create three variables in your package:1) Expression. A String which will contain the expression to be evaluated, eg (248/5)*30 in this case.2) Result. A Single which will contain the result.3) SQLExpression a String which is a calculated expression. Set the Expression as follows:"select " + @[User::Expression] + " Result"Notice that, if you click on Evaluate Expression, the result will be as follows:select (248/5)*30 ResultWhich is the query which will give you your result in T-SQL.Now create an ExecuteSQL task. Define the connection to your SQL Server instance and set SQLSourceType to variable. Set the source variable to be User::SQLExpression and set ResultSet to SingleRow.Now move to the Result Set section of the ExecuteSQL task and click on the Add button. Set Result Name to 'Result' and Variable name to User::Result.Done. When the ExecuteSQL task runs it will execute the SQL and store the result in 'Result'.Note that in this case, the result will be 1470, not 1488, as your expression will be performed using integer arithmetic.You can force T-SQL to do the calculation using real arithmetic by using something like this instead: (248.0 / 5) * 30 Help us to help you. For better, quicker and more-focused answers to your questions, consider following the advice in this link.If the answer to your question can be found with a brief Google search, please perform the search yourself, rather than expecting one of the SSC members to do it for you.Please surround any code or links you post with the appropriate IFCode formatting tags. It helps readability a lot.