python - MySQL - inform program that a duplicate INSERT was attempted -

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If an attempt is made to duplicate, is there an easy way to back something in your code?

i want to do something like this (does not work clearly (on duplicate key index updates) - 

  query = "quotation marks (symbol, date) , Open, high, low, off, "+ +", "+ + +", "+ + + + +", "+ + + + +", "+ + +" + "+" + less Click on "Duplicate Main Index" (2) "Click on" + "+" + + + + + + + + + + + + + + + + + + + + + "

Basically I need to prepare a database with millions of entries, but it is usually cut in between It will speed up, and it will speed up, because I could determine how far it was made last time.

DB-API Optimizer.


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