how to sum tow field of table then insert into next row ?

Question

1.00/5 (1 vote)

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hi ...
i want sum field (Sum) and field (Add value) ... then save in
Sum from next Row :

http://s5.picofile.com/file/8166315884/Untitled.png

Posted 25-Jan-15 21:47pm

ghasem110deh

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Comments

Kornfeld Eliyahu Peter 26-Jan-15 4:06am

You should search for 'running total'...

Suvendu Shekhar Giri 26-Jan-15 4:32am

What DBMS you are using? SQL Server? MySQL?

2 solutions

Solution 2

thanks Suvendu !
butt not use ...

i use this cod :

C#

private void button5_Click(object sender, EventArgs e) 
        { 
            int a = 0; 
            try 
            { 
                SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=Shopping;Integrated Security=True"); 
                SqlCommand com = new SqlCommand(); 
                com.Connection = con; 
                com.CommandText = "SELECT TOP 1 Mojodi FROM TMojojdi ORDER BY Id DESC"; 
                con.Open(); 
                SqlDataReader dr = com.ExecuteReader(); 
                if (dr.Read()) 
                { 
                    a = Int32.Parse(dr[0].ToString()); 
                } 
                con.Close(); 
            } 
            catch 
            { 

            } 
            finally 
            { 
                con.Close(); 
                con.Dispose(); 
            } 

            try 
            { 
                SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=Shopping;Integrated Security=True"); 
                SqlCommand com = new SqlCommand(); 
                com.Connection = con; 
                com.CommandType = CommandType.Text; 
                com.CommandText = "Insert Into TMojojdi (Id,Mojodi,Ad,Kam) Values (@i,@m,@a,@k)"; 
                com.Parameters.AddWithValue("@i", textBox6.Text); 
                com.Parameters.AddWithValue("@m", a = a - int.Parse(textBox7.Text)); 
                com.Parameters.AddWithValue("@a", 0); 
                com.Parameters.AddWithValue("@k", textBox7.Text); 
                con.Open(); 
                com.ExecuteNonQuery(); 
                con.Close(); 
                con.Dispose(); 
                MessageBox.Show("Bardasht As Mojodi Ok", "Bardasht"); 
                ShowGrid2(); 
            } 
            catch 
            { 

            } 
            finally 
            { 
                con.Close(); 
                con.Dispose(); 
            } 
        }

how change this code with use your query (union query)

Posted 30-Jan-15 4:10am

ghasem110deh

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Suvendu Shekhar Giri · Accepted Answer · 2015-01-25T23:05:00

Though I can't say this solution to be optimal but should do the job.
Give a try.

SQL

SELECT T1.ID,
        ISNULL((SELECT SUM(T2.AddValue)
         FROM   [TableName] T2
         WHERE  T2.ID < T1.ID),0) AS [Sum]
         ,T1.AddValue
FROM   [TableName] AS T1
UNION
SELECT MAX(ID)+1,SUM(AddValue),NULL FROM [TableName]

Here is an example for your reference:

SQL

DECLARE @TBL TABLE (ID INT, AddValue INT)
INSERT INTO @TBL
    SELECT 1 ID, 255 AddValue
    UNION
    SELECT 2, 45
    UNION
    SELECT 3, 200

SELECT T1.ID,
        ISNULL((SELECT SUM(T2.AddValue)
         FROM   @TBL T2
         WHERE  T2.ID < T1.ID),0) AS [Sum]
         ,T1.AddValue
FROM   @TBL AS T1
UNION
SELECT MAX(ID)+1,SUM(AddValue),NULL FROM @TBL

Output:

ID	   Sum	      AddValue
1	   0	      255
2	   255	      45
3	   300	      200
4	   500	      NULL

Hope it helps :)