MySQL time function-get current time-difference

MySQL gets the current time as now (), unlike SQL Server GETDATE ().

SQL Server to MySQL error after change to limit 1 in top 1:

Select  1  from where visitor_ip="andDateDiff(mi,visitor_time,getdate()) <=  - 1

[ERR] 1582-incorrect parameter count in the native function ' DateDiff '

Searched for units that are mysql->DateDiff only calculated to days.

Correct wording:

Select  1  from where visitor_ip=" and Timestampdiff (Minute,visitor_time,now ())<=  1

MySQL time function-get current time-difference