How to get DATETIME of the row inserted into Table

Question

I need to display number of users created from last login to current login in my ELGG application, but there is no field in the ElggUser to record the date & time of users created (ElggUser Table Structure).

So is there any way to get DATETIME of rows already inserted into Table?

Thank You

Answer 1

Database schema of Elgg does contain this information. ElggUser extends ElggEntity that has attributes time_created, time_updated, last_action containing Unix timestamps representation of entity creation/modification/last action by this entity or on related content.

These attributes are stored in {DB_PREFIX}entities table and are availible as properties of all ElggEntity subclasses.

Answer 2

You have to add a field for recording date and time. For instance my table name is my_table and for date time using created_date then create a trigger as:

DELIMITER ;;
    CREATE TRIGGER `my_table_bi` BEFORE INSERT ON `my_table` FOR EACH ROW
BEGIN
    SET NEW.created_date = NOW();
END;;
DELIMITER ;

Every time for added record the trigger will hit recording the date and time of entry

Answer 3

Don't know, if you can alter your table, but you could add a created column like this:

 ALTER TABLE yourTable ADD COLUMN created timestamp DEFAULT CURRENT_TIMESTAMP;

The column created would then always have the time when a row gets inserted without further ado.