Defining values while creating sql table

-
Hi friends  ,

This post and technique very new to me !!
It reduce lot of repeated work while using SQL queries with other technologies like (C#,Java,Perl etc)

Basically post refers to CREATE TABLE command of SQL

Example : Guess that , you want to calculate percentage of total marks ,get to particular students and store it table.
For that process , we need to create columns as id,fname,lname,totalMarks,Percentage etc.
Then we go for code ,we calculate from insert or select query or others.

I am trying through SQL Server 2008 R2...

Create table of  sample student table :
 
create table SampleTable
(
      id int identity(1,1),
      fname nvarchar(50),
      lname nvarchar(50),
      totalMarks float,
    passFlag as case when  totalMarks> =50 then 'Pass' else 'Fail' end persisted
)

Insert record and select query :

 
I hope you enjoy it..!! Feel free to suggest corrections .
 

Comments

Post a Comment

Popular posts from this blog

File operations in C# (.net)

-
Here we are performing some basic file operations which widely needed in applications. ASPX :     <div>         <asp:Button ID="Button1" runat="server" Text="CLick" onclick="Button1_Click" />         <asp:FileUpload ID="FileUpload1" runat="server" /><br /><br />          </div> C# :        using System.IO;        using System.Text;         protected void Button1_Click(object sender, EventArgs e)         {             string path = @"E:\MVC Application Demos\ABC.txt";            // File Path taken             string name = FileUpload1.FileName.ToString();                // Here we get File Name only             string pa...
Read more

Add Serial no in crystal report without coding

-
Image
Adding a serial number in grouping without any code. I have placed the step by step screenshots which will explain easily how to do it.   1) Add a new field in Running Total Fields in Field Explorer   Give a proper name to your Running total name. For example I have choosen here RTotal0. Now categorize based on which field in database you want to summarize it. Next is as we want serial number select count. If you want your serial number to start again from the start when the value in the group changes then select on change of group and specify the grouping name else keep the default value.   Smaple Preview of the Design View of Report where I Have added SRNo column at the start in grouping section.  
Read more

How to get top " n " number of rows from table

-
Suppose you want top n values from table , so execute following query with replacement of following item as mention below : 1 )  Replace your our tablename with [table_name] 2 )  Replace your "n" with row numbers  (how many rows you want ) [ Note :  You can do multiply and division operations also ] Query for Top rows : SELECT MainSQL .* FROM ( SELECT t .*, ROW_NUMBER () OVER ( ORDER BY 1 ) Row_Number , COUNT ( 1 ) OVER ( ORDER BY 1 RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING ) Row_Count FROM (SELECT * FROM [table_name] )  t ORDER BY 1 ) MainSQL WHERE Row_Number >= 1 AND Row_Number < ( 1 + 2 ) ORDER BY Row_Number ; Query for Bottom  rows : SELECT MainSQL .* FROM ( SELECT t .*, ROW_NUMBER () OVER ( ORDER BY 1 ) Row_Number , COUNT ( 1 ) OVER ( ORDER BY 1 RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING ) Row_C...
Read more