删除 MySQL 列中用括号括起来的尾部数字
为此,请结合使用 trim() 与 substring()。我们先创建一个表 −
mysql> create table DemoTable ( Name varchar(100) ); Query OK, 0 rows affected (0.80 sec)
使用 insert 命令插入一些记录到表中 −
mysql> insert into DemoTable values('1stJohn');
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable values('1stJohn (7)');
Query OK, 1 row affected (0.65 sec)
mysql> insert into DemoTable values('2ndSam');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable values('2ndSam (4)');
Query OK, 1 row affected (0.15 sec)使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
将会产生以下输出 −
+-------------+ | Name | +-------------+ | 1stJohn | | 1stJohn (7) | | 2ndSam | | 2ndSam (4) | +-------------+ 4 rows in set (0.00 sec)
以下是查询以从 MySQL 列中删除用括号括起来的尾部数字 −
mysql> select trim(substring(Name, 1, (CHAR_LENGTH(Name) - LOCATE('(', REVERSE(Name))))) AS RemovingTrailingNumbers from DemoTable;将会产生以下输出 −
+-------------------------+ | RemovingTrailingNumbers | +-------------------------+ | 1stJohn | | 1stJohn | | 2ndSam | | 2ndSam | +-------------------------+ 4 rows in set (0.00 sec)
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