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Concatenation doesn't work in phpmyadmin XAMPP

I tried to use "||" for concatenation:

The query I used:

"SELECT id, name, age, age||id FROM myTable;"

This is the output:

Can anyone tell me why the output is not 201 (in first column) and 162(in second column)?? Also it gives similar outputs when I use two attributes that are of varchar datatype and the above two attributes are of int datatype.

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3

Answers


  1. 0

    There is no such concatenation in mySQL. This is Oracle SQL dialect. You have to use the CONCAT function in mysql

    SELECT id, name, age, CONCAT(age,id) FROM myTable
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  2. 0

    Can anyone tell me why the output is not 201

    its because, in mysql, you need to enable PIPES_AS_CONCAT. in order to work with ||

    If the PIPES_AS_CONCAT SQL mode is enabled, || signifies the
    SQL-standard string concatenation operator (like CONCAT()).

    You can set it using phpmyadmin->variables->searchFor SQL_MODE

    enter image description here

    Refer mysql doc

    But i would suggest you to use

    CONCAT(columnName1, columnName2, ...)
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  3. 0

    visit the Mysql Documentations :
    on this link you will find a list of String Functions and Operators

    but you not use|| to concatenate caratcters or strings but do this :

    1. SELECT id, name, age, concat(age,id) FROM myTable; or
    2. SELECT id, name, age, concat_ws(' ',age,id) FROM myTable; if you want to space the age with id like this for example 23 1. 23 for age and 1 for id.
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