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[英]How to Update existing record and insert new record in SQL table ? SQL
[英]How to update only 2 columns of table and save as new record?
假設我將 SQL 數據庫表作為客戶,並且(它具有主鍵 ID)表的列如 VisitDate、Company、CompanyRepresentative、City、Phone、E-mail、VisitNotes、Stuation(Lost、Signed 等)、VisitTime(1- 2-3..)
我只想更新 VisitNotes 和 Stuation 列並將記錄另存為新行。 所以它應該給我其他字段相同但 VisitNotes 和 Stuation 改變。
請看下文;
enter` if (!string.IsNullOrEmpty(Session["ID"].ToString()))
{
SqlCommand cmdUpdate = new SqlCommand("UPDATE Customer_list SET Company=@Company,VisitDate=@VisitDate,Stuation=@Stuation,VisitNotes=@VisitNotes,City=@City,Phone=@Phone,Email=@Email,VisitTime=@VisitTime, WHERE ID='" + Session["ID"].ToString() + "'", connBizim);
cmdUpdate.Parameters.AddWithValue("@VisitDate", Convert.ToDateTime(txtDate.Text));
cmdUpdate.Parameters.AddWithValue("@Company", txtCompany.Text);
cmdUpdate.Parameters.AddWithValue("@Phone", txtPhone.Text);
cmdUpdate.Parameters.AddWithValue("@Stuation", DpStuation.Text);
cmdUpdate.Parameters.AddWithValue("@EMAIL", txtEmail.Text);
cmdUpdate.Parameters.AddWithValue("@VisitNotes", txtVisitNotes.Text);
cmdUpdate.Parameters.AddWithValue("@City", txtCity.Text);
cmdUpdate.Parameters.AddWithValue("@VisitTime", Convert.ToInt32(txtVisitTime.Text) + 1);
conn.Open();
cmdUpdate.ExecuteNonQuery();
conn.Close();
Session["ID"] = "";
}
else
{
SqlCommand cmdinsert = new SqlCommand("INSERT INTO Customer_list SET Company=@Company,VisitDate=@VisitDate,Stuation=@Stuation,VisitNotes=@VisitNotes,City=@City,Phone=@Phone,Email=@Email,VisitTime=@VisitTime, WHERE ID='" + Session["ID"].ToString() + "'", connBizim);
cmdinsert.Parameters.AddWithValue("@VisitDate", Convert.ToDateTime(txtDate.Text));
cmdinsert.Parameters.AddWithValue("@Company", txtCompany.Text);
cmdinsert.Parameters.AddWithValue("@Phone", txtPhone.Text);
cmdinsert.Parameters.AddWithValue("@Stuation", DpStuation.Text);
cmdinsert.Parameters.AddWithValue("@EMAIL", txtEmail.Text);
cmdinsert.Parameters.AddWithValue("@VisitNotes", txtVisitNotes.Text);
cmdinsert.Parameters.AddWithValue("@City", txtCity.Text);
cmdinsert.Parameters.AddWithValue("@VisitTime", Convert.ToInt32(txtVisitTime.Text));
conn.Open();
cmdinsert.ExecuteNonQuery();
conn.Close();
Session["ID"] = "";
Response.Redirect("Customer_List.aspx");
}`
你可以用INSERT INTO SELECT
來做到這一點。
我為你准備了一個小演示。 它不適用於您的示例,但它會幫助您了解如何操作。 您現在需要將其調整為您的特定示例。
對於表:
create table Customer (ID int, name varchar(10), VisitNotes int, Stuation int)
它會是這樣的:
insert into Customer
select distinct id, name, 5, 6
from customer
where id = 1;
從表中選擇時更改訪問日期和狀態:
insert into test
select 'NewVisitDate' as VisitDate ,Company,CompanyRepresentative,City,Phone,E-mail,
VisitNotes,'NewStuation' as Stuation
from test;
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