concatenation in mysql is done using CONCAT()
LIKE CONCAT('%', @name , '%')
FULL STATEMENT
DELIMITER $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `employee_with_asset`
(
IN _name VARCHAR(250)
)
BEGIN
SELECT a.Asset_code,
a.name as name1,
a.type,
a.description,
`purchase date`,
`amc availability`,
`amc renewal`,
`employee Id`,
b.Name
FROM `asset_details` a
INNER JOIN employee b
ON a.`assigned to` = b.`employee Id`
WHERE b.Name LIKE CONCAT('%', _name , '%');
END $$
DELIMITER ;
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