C# cultureinfo的名称空间称为全球化？非常感谢您的帮助，我从内存中删除了一个参数，代码已编辑。是的，系统。全球化是正确的名称空间。CONVERT在SQLite中不可用。请尝试替换CONVERT到CASTCAST（替换（TotalTrans，，，，，'

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cultureinfo的名称空间称为全球化？非常感谢您的帮助，我从内存中删除了一个参数，代码已编辑。是的，系统。全球化是正确的名称空间。

CONVERT

在SQLite中不可用。请尝试替换

CONVERT

到

CAST

CAST（替换（TotalTrans，，，，，''）为float）

我将尝试您的方法。我尝试了第一个查询，但如果我执行totalTrans>3，则得到的所有值都小于1000。。非常奇怪的NewUser，您是否使用SQLite的命令行工具测试过您的查询？在Windows/sqlite外壳的预编译二进制文件下查看是否有我们可以共享屏幕的服务？我是新来的，不知道如何运行这个新用户，这不是我可以在办公室使用的，但是这个工具非常简单。下载、解压缩并复制到C:\Windows\system32。打开命令提示符，

cd

到存储数据库的目录，输入

sqlite3 datafile

，其中

datafile

是数据库的文件名。从那里可以运行查询。喜欢这个工具，我每天都用。

string sql14 = "select YYMM, TotalTrans  from t2 where CAST(TotalTrans as int) < 500000 and CAST(TotalTrans as int) > 1000";

string sql14 = "select YYMM, TotalTrans  from t2 where CAST(TotalTrans as int) <  500000 and CAST(TotalTrans as int) > 1000";
SQLiteCommand cmd5 = new SQLiteCommand(sql14, sqlite_conn);


SQLiteDataReader rdr5 = cmd5.ExecuteReader();

while (rdr5.Read())
{

  int TotalTranst22;
  DateTime yyyymmt22;

  if (DateTime.TryParse(rdr5["YYMM"].ToString(), out yyyymmt22) && int.TryParse(rdr5["TotalTrans"].ToString(), out TotalTranst22))
  {
      // Populating the lists

      YYMMt22.Add(yyyymmt22);
      TotalTransIrregularitiest22.Add(TotalTranst22);
  }
}

SELECT CAST(TotalTrans as int) FROM t2`

// Total Trans tolerance <1000

string sql13 = "select YYMM, TotalTrans  from t2 where cast(TotalTrans as int) < 1000";

    string sql14 = "select YYMM, TotalTrans  from t2 where CAST(REPLACE(TotalTrans, ',', '') as int) < 500000 and CAST(REPLACE(TotalTrans, ',', '') as int) > 1000";
        SQLiteCommand cmd5 = new SQLiteCommand(sql14, sqlite_conn);


        SQLiteDataReader rdr5 = cmd5.ExecuteReader();

        while (rdr5.Read())
        {

            int TotalTranst22;


            DateTime yyyymmt22;
            if (DateTime.TryParse(rdr5["YYMM"].ToString(), out yyyymmt22) && int.TryParse(rdr5["TotalTrans"].ToString(), out TotalTranst22))
            {
                YYMMt22.Add(yyyymmt22);
                TotalTransIrregularitiest22.Add(TotalTranst22);
            }
        }

string sql14 = "select YYMM, TotalTrans  from t2 where CAST(REPLACE(TotalTrans, ',', '') as int) < 500000 and CAST(REPLACE(TotalTrans, ',', '') as int) > 1000"

SQLiteCommand cmd5 = new SQLiteCommand(sql14, sqlite_conn);
    SQLiteDataReader rdr5 = cmd5.ExecuteReader();

    while (rdr5.Read())
    {
        int TotalTranst22;
        DateTime yyyymmt22;
        if (DateTime.TryParse(rdr5["YYMM"].ToString(), out yyyymmt22) && int.TryParse(rdr5["TotalTrans"].ToString(), NumberStyles.Number, CultureInfo.CurrentCulture, out TotalTranst22))
        {
            YYMMt22.Add(yyyymmt22);
            TotalTransIrregularitiest22.Add(TotalTranst22);
        }
    }

select 
    convert(float, replace(TotalTrans,',',''))
from
(
    select '336,604' as TotalTrans 
    union all
    select '329,548' as TotalTrans 
    union all
    select '2,734,311' as TotalTrans 
    union all
    select '2.15' as TotalTrans -- [done] with convert to float
    union all
    select '4' as TotalTrans 
    union all
    select '78' as TotalTrans 
    union all
    select '' as TotalTrans -- [done] automatic replace to 0
    union all
    select null as TotalTrans -- [done] no record
) a
where cast(replace(TotalTrans,',','') as float) < 1000 

--------
|2.15  |
--------
|4     |
--------
|78    |
--------
|0     |
--------

SELECT YYMM, TotalTrans FROM t2 WHERE length(TotalTrans) > 3;

 SELECT YYMM, TotalTrans FROM t2 WHERE CAST(replace(TotalTrans,',','') BETWEEN 1000 AND 500000;

UPDATE t2 SET TotalTrans = CAST(replace(TotalTrans,',','') AS INTEGER);

if (DateTime.TryParse(rdr5["YYMM"].ToString(), out yyyymmt22) && int.TryParse(rdr5["TotalTrans"].ToString(), out TotalTranst22))

select YYMM, REPLACE(TotalTrans, ',', '')  from t2 where CAST(REPLACE(TotalTrans, ',', '') as int) < 500000 and CAST(REPLACE(TotalTrans, ',', '') as int) > 1000";