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Error while assigning default value to a datetime field in mysql

Rohit Bajaj
Rohit Bajaj asked
Last Modified: 2016-03-27
I am getting the following error on creation of a column with type datetime and setting the default value to NOW().
Basicaly i want to create a column in my table so that whenever a new row is inserted it automatically gets populated with the current date and time.
An error occurred when trying to change the field 'created_on' via

ALTER TABLE `retentions` CHANGE `created_on` `created_on` DATETIME

MySQL said: Invalid default value for 'created_on'

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Whats wrong with this... how can i achieve this..

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