mysql查询最后一条记录的方法：1、查看当前数据库中的表及表结构；2、根据ID自增长，对ID字段进行倒序排序并查看第一行；3、根据当前insert语句并使用函数last_insert_id()查看最后一条记录即可。
本文操作环境：windows7系统、mysql8.0版、Dell G3电脑。
mysql怎么查询最后一条?
MySQL查询最后一条记录
一、环境和数据准备
1.查看当前数据库中的表
mysql> show tables; +----------------+ | Tables_in_test | +----------------+ | my_insert1 | | my_insert2 | +----------------+
2.查看my_insert1表结构
mysql> show create table my_insert1\G; *************************** 1. row *************************** Table: my_insert1 Create Table: CREATE TABLE `my_insert1` ( `name` varchar(10) CHARACTER SET latin1 DEFAULT NULL, `password` varchar(32) CHARACTER SET latin1 DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8 1 row in set (0.00 sec)
3.查看my_insert2表结构
mysql> show create table my_insert2\G;
*************************** 1. row ***************************
Table: my_insert2
Create Table: CREATE TABLE `my_insert2` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(10) CHARACTER SET latin1 DEFAULT NULL,
`password` varchar(32) CHARACTER SET latin1 DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
1 row in set (0.00 sec)4.向表my_insert1和my_insert2表中插入记录
mysql> insert into my_insert1(name,password) values ('黄飞鸿',password(123456)),('李小龙',password(123456)); mysql> insert into my_insert2(id,name,password) values (null,'黄飞鸿',password(123456)),(null,'李小龙',password(123456));
5.查看表的记录
mysql> select * from my_insert1; +-----------+----------------------------------+ | name | password | +-----------+----------------------------------+ | 黄飞鸿 | *6BB4837EB74329105EE4568DDA7DC67 | | 李小龙 | *6BB4837EB74329105EE4568DDA7DC67 | +-----------+----------------------------------+ mysql> select * from my_insert2; +----+-----------+----------------------------------+ | id | name | password | +----+-----------+----------------------------------+ | 1 | 黄飞鸿 | *6BB4837EB74329105EE4568DDA7DC67 | | 2 | 李小龙 | *6BB4837EB74329105EE4568DDA7DC67 | | 3 | 李连杰 | *6BB4837EB74329105EE4568DDA7DC67 | +----+-----------+----------------------------------+
二、当表中没有ID自增长字段和有ID自增长查看最后一条记录的方式
1.由于my_insert1,没有ID自增长,查看当前表中有多少条记录
mysql> select count(*) from my_insert1; +----------+ | count(*) | +----------+ | 2 | +----------+ 1 row in set (0.00 sec)
2.查看当前表的第2行记录
mysql> select * from my_insert1 limit 1,1; +-----------+----------------------------------+ | name | password | +-----------+----------------------------------+ | 李小龙 | *6BB4837EB74329105EE4568DDA7DC67 | +-----------+----------------------------------+ 1 row in set (0.00 sec)
3.根据ID自增长，使用子查询查看表ID字段最大值
mysql> select * from my_insert2 where id=(select max(id) from my_insert2); +----+-----------+----------------------------------+ | id | name | password | +----+-----------+----------------------------------+ | 3 | 李连杰 | *6BB4837EB74329105EE4568DDA7DC67 | +----+-----------+----------------------------------+
4.根据ID自增长，对ID字段进行倒序排序，并查看第一行
mysql> select * from my_insert2 order by id desc limit 1; +----+-----------+----------------------------------+ | id | name | password | +----+-----------+----------------------------------+ | 3 | 李连杰 | *6BB4837EB74329105EE4568DDA7DC67 | +----+-----------+----------------------------------+
5.可以根据当前insert语句使用函数last_insert_id(),查看最后一条记录
mysql> insert into my_insert2(id,name,password) values(null,'霍元甲',password('123456')); Query OK, 1 row affected, 1 warning (0.00 sec) mysql> select * from my_insert2 where id=(select last_insert_id()); +----+-----------+----------------------------------+ | id | name | password | +----+-----------+----------------------------------+ | 4 | 霍元甲 | *6BB4837EB74329105EE4568DDA7DC67 | +----+-----------+----------------------------------+ 1 row in set (0.00 sec)
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