Maison >base de données >tutoriel mysql >Exemple de code pour l'insertion par lots MySql afin d'optimiser l'efficacité de l'exécution de SQL
Cet article présente principalement les informations pertinentes sur les exemples d'efficacité d'exécution SQL d'optimisation d'insertion par lots MySql. Les amis qui en ont besoin peuvent se référer à
Explication détaillée des exemples d'efficacité d'exécution SQL d'optimisation d'insertion par lots MySql<.>
Le nombre d'itemcontractprice est d'environ 10 000, et chaque itemcontractprice insère 5 journaux.
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);Normalement, cela prend environ 20 secondes
Ce qui précède est le contenu détaillé de. pour plus d'informations, suivez d'autres articles connexes sur le site Web de PHP en chinois!