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Remove last char if it's a specific character in MySQL?
To remove last char if it is a specific character then use SUBSTRING(). Let us first create a table −
mysql> create table DemoTable ( SubjectName varchar(100) ); Query OK, 0 rows affected (0.47 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('MySQL');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable values('MongoDB?');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values('Java?');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('C');
Query OK, 1 row affected (0.16 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
+-------------+ | SubjectName | +-------------+ | MySQL | | MongoDB? | | Java? | | C | +-------------+ 4 rows in set (0.00 sec)
Here is the query to remove last char if it's a specific character, for example question mark (?) here −
mysql> update DemoTable SET SubjectName = SUBSTRING(SubjectName, 1, CHAR_LENGTH(SubjectName) - 1) where SubjectName like '%?'; Query OK, 2 rows affected (0.25 sec) Rows matched : 2 Changed : 2 Warnings : 0
Let us check the table records once again −
mysql> select *from DemoTable;
Output
+-------------+ | SubjectName | +-------------+ | MySQL | | MongoDB | | Java | | C | +-------------+ 4 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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