[Solved] The error of the database Unknown column ” in ‘field list’

CREATE TABLE `Employee`
(
`emp_id` INT PRIMARY KEY,
    `name` VARCHAR(20),
    `birth_date` DATE,
    `sex` VARCHAR(2),
    `salary` INT,
    `branch_id` INT,
    `sup_id` INT,
    FOREIGN KEY (`branch_id`) REFERENCES `Branch` (`branch_id`) ON DELETE SET NULL
);

Some small problems in the process of learning the database,

INSERT INTO `Employee` VALUES (206, `Xiaohuang`, `1998-10-08`, `male`, 50000,NULL,NULL);

When we insert this data, an error is reported

But what we define is the name of the string type and our input is indeed the quotation mark under ~ esc

when i change to

INSERT INTO `Employee` VALUES (206, 'Xiaohuang', '1998-10-08', 'male', 50000,NULL,NULL);

The program runs successfully