1select timestampdiff(microsecond,'2000-01-01 00:00:00','2001-01-01 00:00:00.123456');
2timestampdiff(microsecond,'2000-01-01 00:00:00','2001-01-01 00:00:00.123456')
331622400123456
4explain extended select timestampdiff(microsecond,'2000-01-01 00:00:00','2001-01-01 00:00:00.123456');
5id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
61	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
7Warnings:
8Note	1003	select timestampdiff(MICROSECOND,'2000-01-01 00:00:00','2001-01-01 00:00:00.123456') AS `timestampdiff(microsecond,'2000-01-01 00:00:00','2001-01-01 00:00:00.123456')`
9create view v1 as select timestampdiff(microsecond,'2000-01-01 00:00:00','2001-01-01 00:00:00.123456');
10select * from v1;
11Name_exp_1
1231622400123456
13drop view v1;
14