mysql - Auto-increment - automatic reset for each year -


mysql/innodb

in case receipts should counted on yearly basis; 1/2015, 2/2015 ... 556/2015 , on. when next year comes, counter should start 1 again , receipts should counted 1/2016, 2/2016 ...

how define auto_increment field reset on yearly basis?

rcid | rcno | rcyear | ... =====+======+========+====  200 |    1 |   2015 |  201 |    2 |   2015 |  ... |  ... |   2015 |       756 |  556 |   2015 |     <- last receipt in 2015  757 |    1 |   2016 |     <- yearly counter restarted

note: rcid standard pk auto incremented field.

this not proper usage of auto_increment. if want special describe, yourself.

myisam has feature (the second column in primary key auto_increment that). innodb preferred these days. way simulate in my blog


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