SQL Server 中的自定义查询

Question

First I am using sql server, .NET and crystal report. I have a table called vehicles contain name, model, price and other data. I want to allow the user to get a custom report by speicfy the vehicle price and the condition( > or < or = ) and get all vehicles that has the same condition.How can I do that?

Answer 1

Unfortunately I did not get any useful answer, after search I got a good method. Not the best but it is useful. First I created a procedure in sql server as the following :

create proc get_vehicles
@condition varchar(1),
@price varchar(20)
as

declare @SQL VarChar(1000)

set @SQL = 'SELECT * FROM vehicles ' 

if @condition='>'  set @sql=@sql + ' where price > ' + @price 
else if @condition='<'  set @sql=@sql + ' where price < ' + @price 
else if @condition='='  set @sql=@sql + ' where price = ' + @price  

Exec ( @SQL)

go

Then I created a crystalReportViewer file and call "get_vehicles" procedure.

Finally, in button "get report" I take the user choice from radioButtons and textBox and set them into crystalReportView parameters. I answered my question to help other beginners programmers like me.