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SQLite - How do you join tables from different databases?
...ched is a compile time setting(SQLITE_MAX_ATTACHED), currently defaults to 10, but this too may vary by the build you have. The global limit is 125.
attach 'database1.db' as db1;
attach 'database2.db' as db2;
You can see all connected databases with keyword
.databases
Then you should be able ...
Select 50 items from list at random to write to file
... space efficient for sampling from a
large population: sample(xrange(10000000), 60)
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