MySql批量插入优化Sql执行效率实例详解

MySql批量插入优化Sql执行效率实例详解

itemcontractprice数量1万左右,每条itemcontractprice 插入5条日志。

updateInsertSql.AppendFormat("UPDATE itemcontractprice AS p INNER JOIN foreigncurrency AS f ON p.ForeignCurrencyId = f.ContractPriceId SET p.RemainPrice = f.RemainPrice * {0},p.BuyOutPrice = f.BuyOutPrice * {0},p.ReservedPrice = f.ReservedPrice * {0},p.CollectedPrice = f.CollectedPrice * {0},p.AccessPrice = f.AccessPrice * {0} WHERE p.CurrencyId = {1} AND p.date BETWEEN '{2:yyyy-MM-dd}' AND '{3:yyyy-MM-dd}';", rate.ExchangeRate, exchangeRate.CurrencyId, rate.BeginDate, rate.EndDate); updateInsertSql.AppendFormat("INSERT INTO `itemcontractpricelog`(`ContractPriceType`,`ContractPrice`,`FcContractPrice`,`IsExpire`,`LogRemark`,`CreatedByName`,`CreatedById`,`CreatedDate`,`LogTypeId`,`ProviderId`,`StageId`,`Date`,`CurrencyId`,`ContractPriceId`,`StockPattern`,`ItemId`) SELECT 0,c.RemainPrice,f.RemainPrice,c.RemainIsExpire,'外币汇率调整,重新计算人民币底价','job',0,NOW(),5,c.ProviderId,c.StageId,c.Date,c.CurrencyId,c.ContractPriceId,0,c.ItemId FROM itemcontractprice AS c INNER JOIN foreigncurrency AS f ON c.ForeignCurrencyId = f.ContractPriceId WHERE c.CurrencyId={0} AND c.date BETWEEN '{1:yyyy-MM-dd}' AND '{2:yyyy-MM-dd}';", exchangeRate.CurrencyId, rate.BeginDate, rate.EndDate); updateInsertSql.AppendFormat(" INSERT INTO `itemcontractpricelog`(`ContractPriceType`,`ContractPrice`,`FcContractPrice`,`IsExpire`,`LogRemark`,`CreatedByName`,`CreatedById`,`CreatedDate`,`LogTypeId`,`ProviderId`,`StageId`,`Date`,`CurrencyId`,`ContractPriceId`,`StockPattern`,`ItemId`) SELECT 1,c.BuyOutPrice,f.BuyOutPrice,c.BuyOutIsExpire,'外币汇率调整,重新计算人民币底价','job',0,NOW(),5,c.ProviderId,c.StageId,c.Date,c.CurrencyId,c.ContractPriceId,0,c.ItemId FROM itemcontractprice AS c INNER JOIN foreigncurrency AS f ON c.ForeignCurrencyId = f.ContractPriceId WHERE c.CurrencyId={0} AND c.date BETWEEN '{1:yyyy-MM-dd}' AND '{2:yyyy-MM-dd}';", exchangeRate.CurrencyId, rate.BeginDate, rate.EndDate); updateInsertSql.AppendFormat("INSERT INTO `itemcontractpricelog`(`ContractPriceType`,`ContractPrice`,`FcContractPrice`,`IsExpire`,`LogRemark`,`CreatedByName`,`CreatedById`,`CreatedDate`,`LogTypeId`,`ProviderId`,`StageId`,`Date`,`CurrencyId`,`ContractPriceId`,`StockPattern`,`ItemId`) SELECT 2,c.ReservedPrice,f.ReservedPrice,c.ReservedIsExpire,'外币汇率调整,重新计算人民币底价','job',0,NOW(),5,c.ProviderId,c.StageId,c.Date,c.CurrencyId,c.ContractPriceId,0,c.ItemId FROM itemcontractprice AS c INNER JOIN foreigncurrency AS f ON c.ForeignCurrencyId = f.ContractPriceId WHERE c.CurrencyId={0} AND c.date BETWEEN '{1:yyyy-MM-dd}' AND '{2:yyyy-MM-dd}';", exchangeRate.CurrencyId, rate.BeginDate, rate.EndDate); updateInsertSql.AppendFormat("INSERT INTO `itemcontractpricelog`(`ContractPriceType`,`ContractPrice`,`FcContractPrice`,`IsExpire`,`LogRemark`,`CreatedByName`,`CreatedById`,`CreatedDate`,`LogTypeId`,`ProviderId`,`StageId`,`Date`,`CurrencyId`,`ContractPriceId`,`StockPattern`,`ItemId`) SELECT 3,c.CollectedPrice,f.CollectedPrice,c.CollectedIsExpire,'外币汇率调整,重新计算人民币底价','job',0,NOW(),5,c.ProviderId,c.StageId,c.Date,c.CurrencyId,c.ContractPriceId,0,c.ItemId FROM itemcontractprice AS c INNER JOIN foreigncurrency AS f ON c.ForeignCurrencyId = f.ContractPriceId WHERE c.CurrencyId={0} AND c.date BETWEEN '{1:yyyy-MM-dd}' AND '{2:yyyy-MM-dd}';", exchangeRate.CurrencyId, rate.BeginDate, rate.EndDate); updateInsertSql.AppendFormat("INSERT INTO `itemcontractpricelog`(`ContractPriceType`,`ContractPrice`,`FcContractPrice`,`IsExpire`,`LogRemark`,`CreatedByName`,`CreatedById`,`CreatedDate`,`LogTypeId`,`ProviderId`,`StageId`,`Date`,`CurrencyId`,`ContractPriceId`,`StockPattern`,`ItemId`) SELECT 4,c.AccessPrice,f.AccessPrice,c.AccessIsExpire,'外币汇率调整,重新计算人民币底价','job',0,NOW(),5,c.ProviderId,c.StageId,c.Date,c.CurrencyId,c.ContractPriceId,0,c.ItemId FROM itemcontractprice AS c INNER JOIN foreigncurrency AS f ON c.ForeignCurrencyId = f.ContractPriceId WHERE c.CurrencyId={0} AND c.date BETWEEN '{1:yyyy-MM-dd}' AND '{2:yyyy-MM-dd}';", exchangeRate.CurrencyId, rate.BeginDate, rate.EndDate); //var curContractPriceList = itemContractPriceList.Where(o = o.CurrencyId == exchangeRate.CurrencyId && o.Date = rate.BeginDate && o.Date = rate.EndDate).ToList(); logger.InfoFormat("底价更新和日志sql:{0}", updateInsertSql.ToString()); //if (curContractPriceList.Count == 0) continue; int effctRows = 0; using (var tran = UnitOfWorkManager.Begin()) { effctRows = taskRepository.ExecuteSql(updateInsertSql.ToString(), false); tran.Complete(); } logger.InfoFormat("底价更新影响行数:{0}", effctRows); 

正常情况下大概20秒钟就ok.

之前是用EF操作,查询出来 ,要耗时,然后再组装 update语句
,然后再插入日志,这个网络交互的时间加上数据库连接打开关闭的时间,总的执行时间,大概10多分钟。

用sql语句批量操作,可以说效率提升了
40倍,就是大量数据的传输和数据库的处理次数耗时。

所以说,软件开发不是开发完成就行,而是要解决性能上的问题,这才是开发的进阶。

感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!

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