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Editorial Team
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Asked: 2026-06-06T10:43:22+00:00

table is CREATE TABLE `news` ( `id` bigint(20) NOT NULL auto_increment, `title` varchar(255) default

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table is

 CREATE TABLE `news` (
  `id` bigint(20) NOT NULL auto_increment,
  `title` varchar(255) default NULL,
  `tagkey` text NOT NULL,
  PRIMARY KEY  (`id`)
) ;

INSERT INTO `news` VALUES (1, 'TITLE1','3D');
INSERT INTO `news` VALUES (2, 'TITLE2 ','cat');
INSERT INTO `news` VALUES (3, 'TITLE2','BOOKs,3D');
INSERT INTO `news` VALUES (4, 'TITLE1','3D,DOG');
INSERT INTO `news` VALUES (5, 'TITLE2 ','DOG');
INSERT INTO `news` VALUES (6, 'TITLE2','BOOKs,DOG');
INSERT INTO `news` VALUES (7, 'TITLE1','Wolf,DOG');
INSERT INTO `news` VALUES (8, 'TITLE2 ','cat,DOG');
INSERT INTO `news` VALUES (9, 'TITLE2','BOOKs,cat');

how todo query ‘cat’,book . iused this query . but can’t Search right data .

  select * FROM news WHERE tagkey IN ('book','cat')      
    $list = array('cat','DOG');
    $list = array_map('apply_quotes', $list);
    $query = "select * FROM news 
    WHERE tagkey IN (" . join(',', $list) . ") AND id <> $id";
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1 Answer

  1. Editorial Team

    My best Answer would be DO NOT DO THAT, there’s a lot of ‘WHY’, some of them:

    • You lose Performance, dependence, scalability, atomicity, Isolation, Consistency, and beside that there will be some queries simple that you’ll make it more complicate, Conclusion you are doing wrong,,, but what can you do?

    I will recommend you to create a relation table depending of the Cardinality and separate the items in different rows, create index, and Voila!.

    Take a look to this links please, that will help you to improve your skills in the future.

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