Difference between delete from table_a and truncate table_a in MySQL

Delete:
delete rows and space allocated by mysql
data can be roll back again
you can use it with WHERE clause
Truncate:
It is similar to delete. But the difference is you can't roll back data again and you cann't use WHERE clause with it.
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Truncate:

• Works by deallocating all the data pages in the table.
• Will delete all data - you cannot restrict it with a WHERE clause.
• Deletions are not logged.
• Triggers are not fired.
• Cannot be used if any foreign keys reference the table.
• Resets auto id counters.
• Faster.

Delete:

• Works by deleting row by row.
• Can be restricted with a WHERE clause.
• Deletions are logged in the transaction log (if you have logging on obviously) so the delete can be recovered if necessary (depending on your logging settings).
• Triggers are fired.
• Can be used on tables with foreign keys (dependant on your key cascade settings).
• Slower.