Find rows where column value ends with a specific substring in MySQL?
To find rows and update with new value where column value ends with specific substring you need to use LIKE operator.
The syntax is as follows:
UPDATE yourTableName
SET yourColumnName=’yourValue’
WHERE yourColumnName LIKE ‘%.yourString’;
To understand the above syntax, let us create a table. The query to create a table is as follows:
mysql> create table RowEndsWithSpecificString
-> (
-> Id int NOT NULL AUTO_INCREMENT,
-> FileName varchar(30),
-> PRIMARY KEY(Id)
-> );
Query OK, 0 rows affected (1.50 sec)
Now you can insert some records in the table using insert command. The query is as follows:
mysql> insert into RowEndsWithSpecificString(FileName) values('MergeSort.c');
Query OK, 1 row affected (0.11 sec)
mysql> insert into RowEndsWithSpecificString(FileName) values('BubbleSortIntroduction.pdf');
Query OK, 1 row affected (0.25 sec)
mysql> insert into RowEndsWithSpecificString(FileName) values('AllMySQLQuery.docx');
Query OK, 1 row affected (0.18 sec)
mysql> insert into RowEndsWithSpecificString(FileName) values('JavaCollections.pdf');
Query OK, 1 row affected (0.16 sec)
mysql> insert into RowEndsWithSpecificString(FileName) values('JavaServlet.pdf');
Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement. The query is as follows:
mysql> select *from RowEndsWithSpecificString;
The following is the output:
+----+----------------------------+
| Id | FileName |
+----+----------------------------+
| 1 | MergeSort.c |
| 2 | BubbleSortIntroduction.pdf |
| 3 | AllMySQLQuery.docx |
| 4 | JavaCollections.pdf |
| 5 | JavaServlet.pdf |
+----+----------------------------+
5 rows in set (0.00 sec)
Here is the query to find and update where column value ends with specific substring. The following query finds a substring that ends with ‘.docx’ and updates with a new substring which is ‘.pdf’. The query is as follows:
mysql> update RowEndsWithSpecificString
-> set FileName='IntroductionToCoreJava.pdf'
-> where FileName LIKE '%.docx';
Query OK, 1 row affected (0.14 sec)
Rows matched: 1 Changed: 1 Warnings: 0
Now check the table records once again. The query is as follows:
mysql> select *from RowEndsWithSpecificString;
The following is the output:
+----+----------------------------+
| Id | FileName |
+----+----------------------------+
| 1 | IntroductionToCoreJava.pdf |
| 2 | BubbleSortIntroduction.pdf |
| 3 | IntroductionToCoreJava.pdf |
| 4 | JavaCollections.pdf |
| 5 | JavaServlet.pdf |
+----+----------------------------+
5 rows in set (0.00 sec)
Published on 26-Feb-2019 10:13:55
