Get Latest Values From Database With Max Datetime

Sep 12, 2006

Hi,

I have two tables TABLEA and TABLEB. They both have the same columns. I need to insert data from TABLEA to TABLEB based on the following conditions

TABLEA Structure with Sample Data

PKEY

Attribute

Value

Updated_DateTime

1

A

2.2

08:30AM

2

A

3.3

08:40AM

3

B

3.2

08:40AM

4

C

1.1

08:00AM

5

C

1.2

08:43PM

6

D

1.01

08:42AM

This is the sample data for TABLEB

PKEY

Attribute

Value

01

A

2.2

02

F

3.3

03

B

3.2

04

D

1.01

Now..When inserting data into TABLE B ,

->I need to check if the Attribute already exists in TABLE B .

-> If it already exists then I must update the Value feild with the latest value from TABLEA based on updated_datetime.

(Ex: Attribute 'A' already exists in tableB so i need to update the VALUE feild in TABLE B to 3.3 which is the latest updated value in TABLEA at 08:40AM)

-> If the Attribute doesnt exist then I simply need to insert that row into TABLEB

Can some one please post the query or the procedure that I can use for the above requirement.

Any help greatly appreciated.This is a urgent requirement for me.Please help

Thanks

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Hi,
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End Sub

End Class
==============================================

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when he go out he press button and my problem begin :
How to UPDATE exactly that row with that EmployeeID and lastest day when he came ?

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Problem When Insert DateTime To DataBase

May 16, 2007

the column type of stime and etime in Dabase both are datetime
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     public DateTime loginTime    {        get        {
            //got user enter page's time            return DateTime.Now;        }        }

//record user's using time when user click exit button
    protected void Button1_Click(object sender, EventArgs e)    {
            int Member_No = Int32.Parse(cls_login2.GetCurrent_login_Member_no(this.Page));            int Lesson_No = Int32.Parse(Lesson_no);            int Prestep = 1;            string RemoteIp = Request.ServerVariables["REMOTE_ADDR"].ToString();
            string sqlConn = "Insert into pro_Study_log (Member_no,Lesson_no,Study_log_stepid,Study_log_stime,Study_log_etime,Study_log_ip) ";            sqlConn += "values(" + Member_No + "," + Lesson_No + "," + Prestep + "," + loginTime + ", getdate(), '" + RemoteIp + "')";            SqlConnection connLog = new SqlConnection(StrConn);
            SqlCommand cmdLog = new SqlCommand(sqlConn, connLog);            cmdLog.CommandType = CommandType.Text;            connLog.Open();            cmdLog.ExecuteNonQuery();            connLog.Close();
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and then I got error message on column Study_log_stime
I also trid   set the dateimt tostring , still doesn't work..

I don't know where I did wrong... pleae help
many thanks

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Inserting Datetime In Microsoft SQL Database

Dec 29, 2004

Hi,
I am working with "sql server enterprise manager".
How can I insert datetime(i.e. date) value in the datetime column in my database using an sql command?

Eg.
If I have a table named Table1 in my database, and this table is composed of one primary key column and one datetime column (named dateofreceipt), how should the syntax look like?

Thank you
Vuchko

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