仅从 MySQL 表中的值中删除百分号?
我们首先创建一个表格 −
mysql> create table DemoTable828( CustomerName varchar(100), InterestRate varchar(100) ); Query OK, 0 rows affected (0.50 sec)
使用插入命令向表中插入一些记录 −
mysql> insert into DemoTable828 values('Chris','10%'); Query OK, 1 row affected (0.60 sec) mysql> insert into DemoTable828 values('Robert','11.5%'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable828 values('David','15.90%'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable828 values('Bob','20%'); Query OK, 1 row affected (0.16 sec)
使用 select 语句从表中显示所有记录 −
mysql> select *from DemoTable828;
这将产生以下输出 −
+--------------+--------------+ | CustomerName | InterestRate | +--------------+--------------+ | Chris | 10% | | Robert | 11.5% | | David | 15.90% | | Bob | 20% | +--------------+--------------+ 4 rows in set (0.00 sec)
以下是从 MySQL 表中的值中删除百分号的查询 −
mysql> update DemoTable828 set InterestRate=replace(InterestRate,'%',''); Query OK, 4 rows affected (0.18 sec) Rows matched: 4 Changed: 4 Warnings: 0
让我们再次检查表格记录 −
mysql> select *from DemoTable828;
这将产生以下输出 −
+--------------+--------------+ | CustomerName | InterestRate | +--------------+--------------+ | Chris | 10 | | Robert | 11.5 | | David | 15.90 | | Bob | 20 | +--------------+--------------+ 4 rows in set (0.00 sec)
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