如何避免MySQL死锁？

Question

我在存储过程中的查询下面运行，并遇到死锁错误。有人可以建议如何避免死锁吗？

UPDATE dr_importmmrdataaudit MMRAD
       INNER JOIN dr_importmmrdata MMR
               ON ( MMRAD.applicationId = MMR.applicationId
                    AND MMRAD.milestone = MMR.milestone )
SET    MMRAD.isUpdated = 1
WHERE  MMR.cimInvoiceStage <> 'Completed'
       AND MMRAD.processId = processId;

UPDATE dr_importmmrdata MMR
       INNER JOIN dr_importmmrdataaudit MMRAD
               ON ( MMRAD.applicationId = MMR.applicationId
                    AND MMRAD.milestone = MMR.milestone )
SET    MMR.fundingStatus = MMRAD.fundingStatus,
       MMR.applicationPool = MMRAD.applicationPool,
       MMR.taskOrderDescription = MMRAD.taskOrderDescription,
       MMR.taskOrderPoolMatch = MMRAD.taskOrderPoolMatch,
       MMR.milestone = MMRAD.milestone,
       MMR.milestoneAchDate = MMRAD.milestoneAchDate,
       MMR.cimFolderId = MMRAD.cimFolderId,
       MMR.invoiceDate = MMRAD.invoiceDate,
       MMR.milestoneCost = MMRAD.milestoneCost,
       MMR.bpStartDate = MMRAD.bpStartDate,
       MMR.bpEndDate = MMRAD.bpEndDate,
       MMR.program = MMRAD.program,
       MMR.lmiUn = MMRAD.lmiUn,
       MMR.currentContractor = MMRAD.currentContractor,
       MMR.cimInvoiceStage = MMRAD.cimInvoiceStage,
       MMR.lastUploadedBy = user,
       MMR.lastUploadedOn = Now()
WHERE  MMR.cimInvoiceStage <> 'Completed'
       AND MMRAD.processId = processId;

UPDATE dr_importmmrdataaudit
SET    isInserted = 1
WHERE  applicationId NOT IN (SELECT applicationId
                             FROM   dr_importmmrdata)
       AND processId = processId;

INSERT INTO dr_importmmrdata
            (reportType,
             applicationId,
             applicationIdFK,
             milestone,
             fundingStatus,
             applicationPool,
             taskOrderDescription,
             taskOrderPoolMatch,
             milestoneAchDate,
             cimFolderId,
             invoiceDate,
             milestoneCost,
             bpStartDate,
             bpEndDate,
             program,
             lmiUn,
             currentContractor,
             cimInvoiceStage,
             uploadedBy,
             uploadedOn,
             lastUploadedBy,
             lastUploadedOn)
SELECT reportType,
       applicationId,
       applicationIdFK,
       milestone,
       fundingStatus,
       applicationPool,
       taskOrderDescription,
       taskOrderPoolMatch,
       milestoneAchDate,
       cimFolderId,
       invoiceDate,
       milestoneCost,
       bpStartDate,
       bpEndDate,
       program,
       lmiUn,
       currentContractor,
       cimInvoiceStage,
       user,
       Now(),
       user,
       Now()
FROM   dr_importmmrdataaudit
WHERE  applicationId NOT IN (SELECT applicationId
                             FROM   dr_importmmrdata)
       AND processId = processId; 

如何避免在尝试获取锁时发现MySQL'Deadlock；尝试重新开始交易”