关键字'where'附近的语法不正确

Question

public bool location() 
{

    string OUI = "OUI";

    SqlConnection con = new SqlConnection(@"Data Source=WIN-218NC1F1FE2\SQLEXPRESS;Initial Catalog=projet;Integrated Security=True");
    con.Open();
    SqlCommand cmd = new SqlCommand("select max(id_reservation) from reservation");
    cmd.Connection = con;
    Int32 maxId = (Int32)cmd.ExecuteScalar();
    string v = Convert.ToString(maxId);
    //correct 


    SqlCommand q = new SqlCommand("insert into reservation(location) values('" + OUI + "') where id_reservation ='"+ maxId + "'", con);
    SqlDataReader da = q.ExecuteReader();
    return true ;
}

问题在命令中:关键字'where'附近的语法不正确.救命 !!!

Answer 1

你不能where在insert声明中有一个条款.这就是它的全部.如果要插入,请删除该where子句.如果需要更新符合条件的记录,请不要使用insertbut update.

另外,如果您对查询结果不是真的感兴趣,请不要使用ExecuteReaderbut ExecuteNonQuery.