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What's the best way to get a sample set of a big table without primary key?
This is what is happening here:
We have lots of big data, table's size is often around billion and there is no integer id for primary key.
We need to get a small set of sample data (1%), current solution is for the tables with big int fi
We have lots of big data, table's size is often around billion and there is no integer id for primary key.
We need to get a small set of sample data (1%), current solution is for the tables with big int fi
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