This is a very simple MySQL query.
INSERT INTO users_questions (user_id, question_id, mcopt_id,timestamp)
VALUES (50053, 875, 3092, '2015-08-22 18:01:44');
When I use it I get
ERROR 1054 (42S22): Unknown column 'marks' in 'field list'
marks
is a column in the same table whose default value is set to NULL and in the above query I don't even use the column name marks
.
So why exactly am i getting the error?
Structure of table:
+-------------+-----------+------+-----+-------------------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+-----------+------+-----+-------------------+-------+
| user_id | int(11) | NO | PRI | NULL | |
| question_id | int(11) | NO | PRI | NULL | |
| mcopt_id | int(11) | NO | | NULL | |
| timestamp | timestamp | NO | | CURRENT_TIMESTAMP | |
| marks | int(11) | NO | | NULL | |
+-------------+-----------+------+-----+-------------------+-------+
Just to make it clear I also get the error when I provide the value of marks
INSERT INTO users_questions (user_id, question_id, mcopt_id, timestamp, marks) VALUES (50053, 875, 3094, '2015-08-22 19:15:07', 1)
`
To fix the error above, simply add a quotation mark around the value. You can use both single quotes or double quotes as shown below: INSERT INTO users(username, display_name) VALUES ("jackolantern", 'Jack'); Now the INSERT statement should run without any error.
MySQL error code 1054 occurs if we forget to add single quotes while inserting a varchar value or due to any missing column.
The MySQL unknown column in field list error happens when you put a column name in your SQL script that can't be found by MySQL. The error above is because there's no student_name column in the students table.
Sometimes, when you implement wrong trigger, it happens. So just drop your trigger by using:
DROP TRIGGER [IF EXISTS] [schema_name.]trigger_name
and it actually worked in my Mysql case. Maybe helpful for some of you.
create table users_questions2
( user_id int not null,
question_id int not null,
mcopt_id int not null,
timestamp timestamp not null,
marks int not null
);
describe users_questions2;
+-------------+-----------+------+-----+-------------------+-----------------------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+-----------+------+-----+-------------------+-----------------------------+
| user_id | int(11) | NO | | NULL | |
| question_id | int(11) | NO | | NULL | |
| mcopt_id | int(11) | NO | | NULL | |
| timestamp | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
| marks | int(11) | NO | | NULL | |
+-------------+-----------+------+-----+-------------------+-----------------------------+
INSERT INTO users_questions2 (user_id, question_id, mcopt_id, timestamp) VALUES (50053, 875, 3092, '2015-08-22 18:01:44');
Error Code: 1364. Field 'marks' doesn't have a default value 0.047 sec
INSERT INTO users_questions2 (user_id, question_id, mcopt_id, timestamp,marks) VALUES (50053, 875, 3092, '2015-08-22 18:01:44',1);
-- 1 row(s) affected
INSERT INTO users_questions2 (user_id, question_id, mcopt_id, timestamp,marks) VALUES (50053, 875, 3092, '2015-08-22 18:01:44',null);
Error Code: 1048. Column 'marks' cannot be null 0.000 sec
drop table users_questions2;
create table users_questions2
( user_id int null,
question_id int null,
mcopt_id int null,
timestamp timestamp null,
marks int null
);
describe users_questions2;
+-------------+-----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+-----------+------+-----+---------+-------+
| user_id | int(11) | YES | | NULL | |
| question_id | int(11) | YES | | NULL | |
| mcopt_id | int(11) | YES | | NULL | |
| timestamp | timestamp | YES | | NULL | |
| marks | int(11) | YES | | NULL | |
+-------------+-----------+------+-----+---------+-------+
INSERT INTO users_questions2 (user_id, question_id, mcopt_id, timestamp) VALUES (50053, 875, 3092, '2015-08-22 18:01:44');
1 row(s) affected
So the only way I can get my describe table to look like yours is if they are not null columns (section A above). Which means your columns do not accept nulls.
show variables like "%version%";
+-------------------------+------------------------------+
| Variable_name | Value |
+-------------------------+------------------------------+
| innodb_version | 5.6.24 |
| protocol_version | 10 |
| slave_type_conversions | |
| version | 5.6.24-log |
| version_comment | MySQL Community Server (GPL) |
| version_compile_machine | x86_64 |
| version_compile_os | Win64 |
+-------------------------+------------------------------+
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