MySql 如何显示表中最新 ID 的记录?
mysqlmysqli database更新于 2023/10/16 8:08:00
首先我们创建一个表 −
mysql> create table DemoTable676( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Number int ); Query OK, 0 rows affected (0.50 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable676(Number) values(1000); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable676(Number) values(1839); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable676(Number) values(29894); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable676(Number) values(1264); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable676(Number) values(190); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable676(Number) values(167); Query OK, 1 row affected (0.11 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable676;
这将产生以下输出 −
+----+--------+ | Id | Number | +----+--------+ | 1 | 1000 | | 2 | 1839 | | 3 | 29894 | | 4 | 1264 | | 5 | 190 | | 6 | 167 | +----+--------+ 6 rows in set (0.00 sec)
以下查询显示表中具有最新 ID 号的记录 −
mysql> select *from DemoTable676 order by Id DESC LIMIT 1;
这将产生以下输出 −
+----+--------+ | Id | Number | +----+--------+ | 6 | 167 | +----+--------+ 1 row in set (0.00 sec)
