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Use MySQL concat() and lower() effectively
The contact() method is used to concatenate. However, lower() is used to change the case to lowercase. For our example, let us create a table.
The query to create a table is as follows
mysql> create table concatAndLowerDemo -> ( -> FirstValue varchar(10), -> SecondValue varchar(10), -> ThirdValue varchar(10), -> FourthValue varchar(10) -> ); Query OK, 0 rows affected (0.55 sec)
Now you can insert some records in the table using insert command.
The query is as follows
mysql> insert into concatAndLowerDemo values('John','12345','Java','MySQL');
Query OK, 1 row affected (0.21 sec)
mysql> insert into concatAndLowerDemo values('Hi','12345','98764','MongoDB');
Query OK, 1 row affected (0.24 sec)
mysql> insert into concatAndLowerDemo values('9485','746464','903940','cpp');
Query OK, 1 row affected (0.15 sec)Display all records from the table using select statement.
The query is as follows
mysql> select *from concatAndLowerDemo;
The following is the output
+------------+-------------+------------+-------------+ | FirstValue | SecondValue | ThirdValue | FourthValue | +------------+-------------+------------+-------------+ | John | 12345 | Java | MySQL | | Hi | 12345 | 98764 | MongoDB | | 9485 | 746464 | 903940 | cpp | +------------+-------------+------------+-------------+ 3 rows in set (0.00 sec)
Here is the query to use concat() and lower() in the same query
mysql> select lower(concat(FirstValue,SecondValue,ThirdValue,FourthValue)) AS lowerDemo from concatAndLowerDemo;
The following is the output
+---------------------+ | lowerDemo | +---------------------+ | john12345javamysql | | hi1234598764mongodb | | 9485746464903940cpp | +---------------------+ 3 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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