使用MySQL在字符串内查找确切的文本

Question

I have a database table with two columns, one for the ID and another one for Colors. Imagine that I have 3 lines in this table with the following data:

ID: 1 => Colors: Blue; Yellow; Red;
ID: 2 => Colors: Green; GreenYellow; Yellowgreen; Blue;
ID: 3 => Colors: Yellow; Blue;

If I want to make a SQL call to know if there is a register with yellow color (just Yellow, no GreenYellow or Yellowgreen). How can I do it? I´m trying with:

$statement = $conexion->prepare("SELECT * FROM comentarios  WHERE suscritos LIKE :suscritos");
$statement->execute(array(":suscritos" => "%Yellow%"));
$todos_mis_mensajes = $statement->fetchAll();

IDs results: 1, 2 and 3

 $statement = $conexion->prepare("SELECT * FROM comentarios  WHERE suscritos LIKE :suscritos");
 $statement->execute(array(":suscritos" => "%Yellow_"));
 $todos_mis_mensajes = $statement->fetchAll();

IDs results: No result

$statement = $conexion->prepare("SELECT * FROM comentarios  WHERE suscritos LIKE :suscritos");
$statement->execute(array(":suscritos" => "_Yellow%"));
$todos_mis_mensajes = $statement->fetchAll();

IDs results: 3

Answer 1

Just put the exact "Yellow" word with no wildcards.

% indicates 0 or more characters.
"%Yellow%" indicates all strings with Yellow word.
"%Yellow" indicates all string that ends in Yellow.
"Yellow%" indicates all string that starts with Yellow.

_ indicates must have exactly 1 character. "_Yellow" all strings that have a character before the Yellow word. ie: aYellow, bYellow
unacceptable: abYellow, Yellow

Answer 2

Try this call:

select * from comentarios where suscritos regexp '[[:<:]]Yellow[[:>:]]';

Find more here about MySQL regular expressions: https://dev.mysql.com/doc/refman/5.7/en/regexp.html