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从MySQL列中删除括号内的尾随数字

2024-05-13 17:33:03 439

为此，请trim()与一起使用substring()。让我们首先创建一个表-

mysql> create table DemoTable
(
   Name varchar(100)
);

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values('1stJohn');
mysql> insert into DemoTable values('1stJohn (7)');
mysql> insert into DemoTable values('2ndSam');
mysql> insert into DemoTable values('2ndSam (4)');

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-

+-------------+
| Name        |
+-------------+
| 1stJohn     |
| 1stJohn (7) |
| 2ndSam      |
| 2ndSam (4)  |
+-------------+
4 rows in set (0.00 sec)

以下是从MySQL列中删除括号内的尾随数字的查询-

mysql> select trim(substring(Name, 1, (CHAR_LENGTH(Name) - LOCATE('(', REVERSE(Name))))) AS RemovingTrailingNumbers from DemoTable;

这将产生以下输出-

+-------------------------+
| RemovingTrailingNumbers |
+-------------------------+
| 1stJohn                 |
| 1stJohn                 |
| 2ndSam                  |
| 2ndSam                  |
+-------------------------+
4 rows in set (0.00 sec)

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从MySQL列中删除括号内的尾随数字

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