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Can MySQL concatenate strings with ||?
Yes, you can concatenate strings with || in MySQL with the help of sql_mode. Set the sql_mode to PIPES_AS_CONCAT.
The syntax is as follows
set sql_mode=PIPES_AS_CONCAT;
The following is the syntax to concat with the help of ||.
SELECT ‘yourValue' || yourColumName 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 PipeConcatDemo - > ( - > Name varchar(20) - > ); Query OK, 0 rows affected (0.93 sec)
Insert some records in the table using insert command.
The query is as follows
mysql> insert into PipeConcatDemo values('Larry');
Query OK, 1 row affected (0.18 sec)
mysql> insert into PipeConcatDemo values('John');
Query OK, 1 row affected (0.15 sec)
mysql> insert into PipeConcatDemo values('Maxwell');
Query OK, 1 row affected (0.23 sec)
mysql> insert into PipeConcatDemo values('Bob');
Query OK, 1 row affected (0.17 sec)Now you can display all records from the table using select statement.
The query is as follows
mysql> select *from PipeConcatDemo;
The following is the output
+---------+ | Name | +---------+ | Larry | | John | | Maxwell | | Bob | +---------+ 4 rows in set (0.00 sec)
Now before concatenation, run the following is the query to change the sql_mode to PIPES_AS_CONCAT
mysql> set sql_mode=PIPES_AS_CONCAT; Query OK, 0 rows affected (0.00 sec)
You can now use || for concatenation:
mysql> select 'Good Morning !!! ' || Name AS PipeConcatenationDemo from PipeConcatDemo;
The following is the output
+--------------------------+ | PipeConcatenationDemo | +--------------------------+ | Good Morning !!! Larry | | Good Morning !!! John | | Good Morning !!! Maxwell | | Good Morning !!! Bob | +--------------------------+ 4 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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