Question

    private void button1_Click(object sender, EventArgs e)
    {
        using (SQLiteConnection con = new 
    SQLiteConnection(connectionstring))
        {
            SQLiteCommand cmd = new SQLiteCommand(connectionstring);
            string CMM = "INSERT INTO ALARM  (ALARM_ID, ALARM ) SELECT 
       1,'TEMP' WHERE NOT EXISTS(SELECT FLAG FROM ALARM WHERE FLAG = 0)";

            cmd.CommandText = CMM;
            cmd.Connection = con;
            con.Open();

            cmd.ExecuteNonQuery();
            }

我在“SELECT”附近收到此错误：语法错误我无法解决此问题。这个查询在sqlite浏览器中运行正常。请帮助我提前谢谢

Answer 1

您的查询似乎错过了from，您可以从中获取数据：

INSERT INTO ALARM  (ALARM_ID, ALARM ) 
  SELECT    1,'TEMP' 
   FROM somehwere -- you where missing this.
   WHERE NOT EXISTS(SELECT FLAG FROM ALARM WHERE FLAG = 0)

或者您只想插入一组值：

INSERT INTO ALARM  (ALARM_ID, ALARM ) 
VALUES (1, 'TEMP')

我在使用Where子句插入值时在c＃应用程序中遇到语法错误

1 个答案: