![[Fix] MySQL ERROR 1054 (42522)- Unknown Column [Fix] MySQL ERROR 1054 (42522)- Unknown Column](https://code2care.org/pages/fix-mysql-error-1054-4222-unknown-column/images/[Fix] MySQL ERROR 1054 (42522)- Unknown Column.jpg)
The MySQL Error 1054 occurs when you try to reference a column that does not exist for a table and you run a SELECT, INSERT, UPDATE, or DELETE query on it.
Let's see by an example, say we have created a table called employee with the below columns,
Table: employeeemployee_id | employee_name | employee_dob | employee_dept | employee_salary |
---|---|---|---|---|
101 | Sam Wise | 23/01/1980 | Pharma | $50,000 |
201 | Diana West | 23/01/2001 | Finance | $70,000 |
Select Statement:
mysql> Select employee_age from employee;
ERROR 1054 (42S22): Unknown column 'employee_age' in 'field list'
Update Statement:
mysql> Update table employee set employee_age=20 where employee_id=101;
ERROR 1054 (42S22): Unknown column 'employee_id' in 'where clause'
Insert Statement:
mysql> insert into employee (employee_id,employee_name,employee_age) values (303,"Mike J",30);
ERROR 1054 (42S22): Unknown column 'employee_id' in 'field list'
Delete Statement:
mysql>delete from employee where employee_age=30;
ERROR 1054 (42S22): Unknown column 'employee_age' in 'where clause'
As you can see the table does not have employee_age hence these errors.
Fix: MySQL ERROR 1054 (42S22)
- Check if the column exists in the table.
- Check that you have connected to the correct database schema (maybe you want UAT and connected to Staging)
- If you have misspelled the column name, just provide the right one.
- Make sure you are using the right table.
- Nothing works, you may have to alter the table to incorporate the column if you really need it.
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