algorithm - Probability of collision when using a 32 bit hash

Question

I have a 10 character string key field in a database. I've used CRC32 to hash this field but I'm worry about duplicates. Could somebody show me the probability of collision in this situation?

p.s. my string field is unique in the database. If the number of string fields is 1 million, what is probability of collision ?

Answer 1

Duplicate of Expected collisions for perfect 32bit crc

The answer referenced this article: http://arstechnica.com/civis/viewtopic.php?f=20&t=149670

Found the image below from: http://preshing.com/20110504/hash-collision-probabilities