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What is the maximum number of characters allowed for a database name to have?

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What is the maximum number of characters allowed for a database name to have?

(a) 16

(b) 32

(c) 64

(d) 128

The question was asked in an interview for job.

I want to ask this question from Structure of the Data Directory in section MySQL Data Directory of MySQL

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Correct option is (c) 64

The explanation: MySQL allows the database names and the table names to be a maximum of 64 characters long. The length of these names is also bound by the length allowed by the operating system on the machine.

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