Mistakenly inserted date in month field sql how to change - sql

Question

Unfortunately I inserted a date as dd-mm-yyyy in sql but it assumed it as mm-dd-yyyy Now more than 50 fields are like this how can I change this? I found an exception as invalid date when I was taking report by date that more than 12. Now I want to change all of the inserted fields without losting it

Answer 1

UPDATE tableName
SET dateColumn = MONTH(dateColumn) + "-" + DAY(vdateColumn) + "-" + YEAR(dateColumn)
I hope this work even though I didn't test it myself. Please use a WHERE clause to limit the update only to the impacted rows.

Answer 2

UPDATE yourTable
SET yourDateColumn = Convert(datetime,yourDateColumn,101)
Let me know if this fixes your issue.

Answer 3

Nothing worked but finally I reset it manually by c# console
Console.WriteLine("Changing Orderdate");
Console.WriteLine("~~~~~~~~~~~~~~~~~~");
List<string> date = new List<string>();
List<string> no = new List<string>();
int i = 0;
SqlCommand cmd = new SqlCommand("select DATEPART(yyyy,orderdate) as y, DATEPART(mm,orderdate) as m, DATEPART(dd,orderdate) as d, bno from bill", con);
con.Open();
SqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
date.Add(dr["y"].ToString() + "-" + dr["d"].ToString() + "-" + dr["m"].ToString());
no.Add(dr["bno"].ToString());
}
con.Close();
foreach (var a in date)
{
Console.WriteLine("Inserting: " + date[i] + " With " + no[i]);
SqlCommand cmd2 = new SqlCommand("update bill set orderdate = '" + date[i] + "' where bno = " + no[i], con);
con.Open();
cmd2.ExecuteNonQuery();
con.Close();
i++;
}
Console.WriteLine("Order date changing completed \n\n");
Thank you for sharing your precious time thanks friends