CREATE TABLE dle_post (
id int NOT NULL AUTO_INCREMENT,
title varchar(255) NULL,
xfields varchar(255) NULL,
PRIMARY KEY (id)
);
INSERT INTO dle_post (xfields) VALUES ('key1|value1||key|123||key3|value3');
SELECT * FROM `dle_post` WHERE CONCAT('|', `xfields`, '|') LIKE '%|key|123|%'