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Which data type is best suited to store currency values?

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Which data type is best suited to store currency values?

(a) INT

(b) FLOAT

(c) DOUBLE

(d) DECIMAL

I have been asked this question in homework.

Question is taken from Checking and Repairing Database Tables topic in chapter Database Maintenance, Backups and Replication of MySQL

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Best answer
Correct answer is (d) DECIMAL

Explanation: Currency is a numeric information. For monetary calculations, FLOAT and DOUBLE are subject to rounding error and may not be suitable. A DECIMAL(M, 2) type is best suited for it.

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