A SQL statement typically used to `UPDATE` records when they exist and `INSERT` them when they do not.
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52 views
Once in a while synchronization of the independently updated mysql databases problem
I have a production database and a test database running on MySQL with MyISAM and InnoDB tables, which are updated independently.
The Production database is updated by system and sometimes by a user.
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159 views
What overhead is there if I MERGE row by row?
I have a target table of about 2000 rows and I want to be able to MERGE (with HOLDLOCK) about 5-10 rows at a time into the target table. The target table doesn't get used heavily, with only 1-2 users ...
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29 views
Merge Replication is Slow for Uploads
I have implemented merge replication with pull subscriptions in production environment. Initially it was working fine, but now a days, its too slow to upload any changes to publisher , but subscribers ...
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31 views
Performance While merging two mysql DBs
I have two similar schema DBs which I need to merge. I was thinking about the performance issues which I need to keep in mind while creating the script. These are the ones which I can think of.
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