如何从 MySQL 中的列中选择前 20 个字符之后的所有字符?
mysqlmysqli database更新于 2025/12/15 17:48:17
首先我们创建一个表 −
mysql> create table DemoTable ( Title text ); Query OK, 0 rows affected (0.86 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values('C is a good programming language to start');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable values('Java is good with data structure and algorithm');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('Coding is very important');
Query OK, 1 row affected (0.20 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
这将产生以下输出 −
+------------------------------------------------+ | Title | +------------------------------------------------+ | C is a good programming language to start | | Java is good with data structure and algorithm | | Coding is very important | +------------------------------------------------+ 3 rows in set (0.00 sec)
以下查询用于选择前 20 个字符之后的所有字符 −
mysql> select substring(Title from 20) from DemoTable;
这将产生以下输出 −
+-----------------------------+ | substring(Title from 20) | +-----------------------------+ | ming language to start | | ata structure and algorithm | | rtant | +-----------------------------+ 3 rows in set (0.00 sec)
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mysql 参考教程 - 该教程包含有关 mysql 的更多信息:https://www.cainiaomax.com/mysql/

