sqlite中替代变量的一种解决方法

   public static DataTable GetAnPaiBySYSID(String ShiYanShiID)
        {
            DataTable rdt = new DataTable();
            //建立数据库连接
            SQLiteDBManager dba = new SQLiteDBManager();
            try
            {
                string sSql = @"DELETE FROM VarTable;
                                INSERT INTO VarTable (
                                                         name,
                                                         value
                                                     )
                                                     SELECT 'AheadTimePart' AS name,
                                                            '-' || PeiZhiXiangZhi || ' minutes'
                                                       FROM LM_JC_XiTongPeiZhiXiang
                                                      WHERE PeiZhiXiangID = 'LM_PZS_0025';

                                INSERT INTO VarTable (
                                                         name,
                                                         value
                                                     )
                                                     SELECT 'DelayTimePart' AS name,
                                                            '+' || PeiZhiXiangZhi || ' minutes'
                                                       FROM LM_JC_XiTongPeiZhiXiang
                                                      WHERE PeiZhiXiangID = 'LM_PZS_0025';

                                SELECT KaoQingAnPaiID,
                                       ShiYanShiID,
                                       MenName,
                                       KaiShiRiQi,
                                       JieShuRiQi,
                                       ShiFouMoRen,
                                       SystemType,
                                       SystemTypeInfo
                                  FROM LM_KQ_KaoQingAnPai
                                 WHERE ShiYanShiID = @ShiYanShiID AND 
                                       datetime('now', '+8 hour') >= datetime(KaiShiRiQi, (
                                                                                  SELECT value
                                                                                    FROM vartable
                                                                                   WHERE name = 'AheadTimePart' limit 1
                                                                              )
                                                                     ) AND 
                                       datetime('now', '+8 hour') <= datetime(JieShuRiQi, (
                                                                                  SELECT value
                                                                                    FROM vartable
                                                                                   WHERE name = 'DelayTimePart' limit 1
                                                                              )
                                                                     ) ";
                SQLiteParameter[] array = new SQLiteParameter[] { new SQLiteParameter("@ShiYanShiID", ShiYanShiID.ToUpper()) };
                // 执行查询语句
                rdt = dba.GetSqlDataTable(sSql, array);
            }
            catch (Exception ex)
            {
                //抛出异常
                throw ex;
            }
            finally
            {
                dba.Dispose();
            }
            return rdt;
        }