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How to get file extension of file as a result of MySQL query?
In order to get file extension of file as a result of SQL query, you can use SUBSTRING_INDEX().
The syntax is as follows
select substring_index(yourColumnName,'.',-1) as anyAliasName from yourTableName;
To understand the above syntax, let us create a table. The query to create a table is as follows
mysql> create table getFileExtensionDemo -> ( -> File_Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> File_Name text -> ); Query OK, 0 rows affected (0.53 sec)
Insert some records in the table using insert command.
The query is as follows
mysql> insert into getFileExtensionDemo(File_Name) values('John.AllMySQLConcept.doc');
Query OK, 1 row affected (0.17 sec)
mysql> insert into getFileExtensionDemo(File_Name) values('Introductiontojava.txt');
Query OK, 1 row affected (0.17 sec)
mysql> insert into getFileExtensionDemo(File_Name) values('C and C++.AllDataStructureandAlgorithm.pdf');
Query OK, 1 row affected (0.14 sec)
mysql> insert into getFileExtensionDemo(File_Name) values('C.Users.Desktop.AllMySQLScript.sql');
Query OK, 1 row affected (0.39 sec)Display all records from the table using select statement.
The query is as follows
mysql> select *from getFileExtensionDemo;
The following is the output
+---------+--------------------------------------------+ | File_Id | File_Name | +---------+--------------------------------------------+ | 1 | John.AllMySQLConcept.doc | | 2 | Introductiontojava.txt | | 3 | C and C++.AllDataStructureandAlgorithm.pdf | | 4 | C.Users.Desktop.AllMySQLScript.sql | +---------+--------------------------------------------+ 4 rows in set (0.00 sec)
Here is the query to get the extension of file as a result of query
mysql> select substring_index(File_Name,'.',-1) as AllFileExtension from getFileExtensionDemo;
The following is the output with only the file extensions
+------------------+ | AllFileExtension | +------------------+ | doc | | txt | | pdf | | sql | +------------------+ 4 rows in set (0.20 sec)
Updated on: 30-Jul-2019
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