Question

我有想要存储在db中的记录数。
数据库的架构是这样的这样的人表：

CREATE TABLE IF NOT EXISTS Person (id INTEGER PRIMARY KEY, name TEXT)

和这样的文件表：

CREATE TABLE IF NOT EXISTS File (id INTEGER PRIMARY KEY, FileName TEXT,FilePath TEXT, PersonID NUMERIC CONSTRAINT person_file REFERENCES [Person]([id])ON DELETE NO ACTION ON UPDATE NO ACTION)

我使用此函数在两个表中执行插入

对于3700记录，这段代码在我的笔记本电脑上耗时140秒，

public long BuildDB(List<DB.Person> persons, List<DB.File> Files, FrmTrain form)
        {
            long result = -1;
            try
            {

                long personID = 0;
                using (SQLiteConnection sqlconnection = new SQLiteConnection("Data Source=" + DbPath + ";Version=3;"))
                {
                    sqlconnection.Open();
                    SQLiteCommand PersonCommand = sqlconnection.CreateCommand();
                    SQLiteParameter personParam = new SQLiteParameter();
                    PersonCommand.CommandText = "INSERT INTO Person('Name') VALUES(?)";
                    PersonCommand.Parameters.Add(personParam);


                    SQLiteCommand FileCommand = sqlconnection.CreateCommand();
                    SQLiteParameter FileParam1 = new SQLiteParameter("@filename");
                    SQLiteParameter FileParam2 = new SQLiteParameter("@filepath");
                    SQLiteParameter FileParam3 = new SQLiteParameter("@personid");

                    FileCommand.CommandText = "INSERT INTO file(FileName,FilePath,PersonID) VALUES(@filename,@filepath,@personid)";
                    FileCommand.Parameters.Add(FileParam1);
                    FileCommand.Parameters.Add(FileParam2);
                    FileCommand.Parameters.Add(FileParam3);
                    for (int i = 0; i < persons.Count; i++)
                    {
                        using (SQLiteTransaction _SQLiteTransaction = sqlconnection.BeginTransaction())
                        {
                            personParam.Value = persons[i].Name;
                            PersonCommand.ExecuteNonQuery();
                            personID = sqlconnection.LastInsertRowId;

                            foreach (var item in Files.Where(f => f.PersonID == personID))
                            {
                                FileParam1.Value = item.FileName;
                                FileParam2.Value = item.FilePath;
                                FileParam3.Value = item.PersonID;
                                FileCommand.ExecuteNonQuery();

                            }
                            _SQLiteTransaction.Commit();
                        }
                        form.Progress();
                    }
                    sqlconnection.Close();
                }
                result = 1;

            }
            catch (Exception e)
            {
                result = 0;
                throw;
            }



            return result;

        }

首先，我在没有交易的情况下编写了该代码，大约需要500秒我试图在事务中包装第二个ExecuteNonQuery，但不仅仅是改进了性能，它花了500秒

无论如何都要提高性能？

Answer 1

尝试使用一个SQLiteTransaction，并且只为所有插入的人使用一个提交。

Error Code: 1054. Unknown column 'players.p_name' in 'where clause'

在插入时提高sqlite.net的性能

1 个答案: