Is there a way to force case sensitivity in MySQL / Rails for a single find?

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离开以前
离开以前 2021-02-09 02:11

I\'m doing some searching of tags, and some users like \"cat\" while others like \"Cat\" Go figure...

Anyways, is there a way to force a particular find to be case sens

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  • 2021-02-09 02:43

    You can also do a case-sensitive search without changing your column properties.

    SELECT * FROM mytable WHERE myfield='Value' 
    

    This query matches:

    • Value
    • value
    • VALUE
    • vAlUe
    • and so on

    While...

    SELECT * FROM mytable WHERE BINARY myfield='Value'
    

    Matches only:

    • Value
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  • 2021-02-09 02:46

    In the mysql database, set your text's data type to utf_collate_bin. For example:

    ALTER TABLE `sets` CHANGE `set_name` `set_name` VARCHAR( 64 ) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL
    

    Where 'sets' is the table, 'set_name' is the column of type VARCHAR(64). You can also do this in PhpMyAdmin..

    Any binary collate will do the job; but utf8 is preferable.

    If you were wondering what the _ci at the end of your current collate is, it means "Case Insensitive" :p

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  • 2021-02-09 03:02

    You can make all strings case sensitive when you create the table by adding "COLLATE utf8_bin" to the :options string when creating the table. For example:

    create_table( "page_infos", :force => true, :options => "ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE utf8_bin") do |t|
          t.string   "title",       :limit => 120
    end
    
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