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I am trying to convert a date in MySQL to milliseconds. This is what I have to get the date:
DATE_ADD(mydate, INTERVAL(1-DAYOFWEEK(mydate)) DAY)
But that returns me like 15/02/2015 and I want to get the milliseconds of that date.
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To convert seconds to milliseconds, you need to multiply the number of seconds by 1000. To convert a Date to milliseconds, you could just call timeIntervalSince1970 and multiply it by 1000 every time.
How to get current timestamp in milliseconds in MySQL? FROM_UNIXTIME(UNIX_TIMESTAMP(CONCAT(DATE(NOW()), ' ', CURTIME(3))); will create a timestamp with milliseconds.
In SQL Server, you can use CONVERT function to convert a DATETIME value to a string with the specified format. In MySQL, you can use DATE_FORMAT function.
UNIX_TIMESTAMP() : This function in MySQL helps to return a Unix timestamp. We can define a Unix timestamp as the number of seconds that have passed since '1970-01-01 00:00:00'UTC. Even if you pass the current date/time or another specified date/time, the function will return a Unix timestamp based on that.
Use the UNIX_TIMESTAMP function.
SELECT (UNIX_TIMESTAMP(mydate)*1000) FROM...
UNIX_TIMESTAMP will get you seconds and you need to multiply by 1000 to get milliseconds.
To convert back, use FROM_UNIXTIME() function.
SELECT FROM_UNIXTIME(date_in_milliseconds/1000) FROM ...
Again, you need to divide by 1000 to get it to seconds before using the function.
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