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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)
Updated on 30-Jul-2019 22:30:24
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