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  1. #1
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    Selecting a row by its highest value

    Hey all,

    I want to select a row by its highest value for a specific field (a field called 'price').

    I tried it with the following command, but it failed:

    SELECT * FROM products WHERE MAX(price) AND gender = 'Mens' AND type = 'T-Shirt';

    This is my table:

    +-----------------+--------------+------+-----+-------------------+-------+
    | Field | Type | Null | Key | Default | Extra |
    +-----------------+--------------+------+-----+-------------------+-------+
    | number | int(10) | YES | | NULL | |
    | gender | varchar(6) | YES | | NULL | |
    | type | varchar(25) | YES | | NULL | |
    | name | varchar(50) | YES | | NULL | |
    | brand | varchar(50) | YES | | NULL | |
    | colour | varchar(50) | YES | | NULL | |
    | material | varchar(50) | YES | | NULL | |
    | countryoforigin | varchar(50) | YES | | NULL | |
    | price | decimal(6,2) | YES | | NULL | |
    | cost | decimal(6,2) | YES | | NULL | |
    | adddate | timestamp | NO | | CURRENT_TIMESTAMP | |
    | weight | int(5) | YES | | NULL | |
    | sizetype | varchar(25) | YES | | NULL | |
    | sizexs | varchar(2) | YES | | NULL | |
    | sizes | varchar(2) | YES | | NULL | |
    | sizem | varchar(2) | YES | | NULL | |
    | sizel | varchar(2) | YES | | NULL | |
    | sizexl | varchar(2) | YES | | NULL | |
    +-----------------+--------------+------+-----+-------------------+-------+

    Does anyone know why it failed?

  • #2
    Super Moderator
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    max(price) needs to be part of the select clause, not the where clause and it's best to specify the exact fields you want rather than using *.

    Code:
    select number, gender, type, name, max(price) as price where gender = 'Mens' AND type = 'T-Shirt';

  • #3
    Senior Coder CFMaBiSmAd's Avatar
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    Code:
    SELECT * FROM products WHERE gender = 'Mens' AND type = 'T-Shirt' ORDER BY price DESC LIMIT 1
    If you are learning PHP, developing PHP code, or debugging PHP code, do yourself a favor and check your web server log for errors and/or turn on full PHP error reporting in php.ini or in a .htaccess file to get PHP to help you.


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