MySQL statement execution details

mysql Execution order

from 》 ON 》join 》where 》 group 》having 》 select 》distinct》order》Limt
（ remarks ： except limt All statements are sql Standard grammar ,limt yes mysql Unique statement
Detailed explanation ：
stay sql During execution on and join These two steps will be executed in a loop until join The end of the table ;
where The following conditional statement Will cycle through , Conditions XXX and XXX Cycle from the most right to the end
Perform advance filtering as a whole Then the columns are filtered Last sort
If multiple tables are connected Under the Cartesian product of the last two tables Connect once