A Database Error Occurred
Error Number: 1452
Cannot add or update a child row: a foreign key constraint fails (dihr.tbl_contract, CONSTRAINT tbl_contract_ibfk_2 FOREIGN KEY (id) REFERENCES tbl_attactment (contract_id) ON DELETE CASCADE ON UPDATE CASCADE)
INSERT INTO tbl_contract (staff_id, type_id, start_date, end_date, status) VALUES ('2', '1', '2018-03-20', '2018-03-30', '1')
Filename: C:/xampp/htdocs/system/database/DB_driver.php
Line Number: 691
This is relationship table here
This is error message here
The id column in the table tbl_contract is dependent on the contract_id column in table tbl_attactment
You are not inserting this tbl_contract.id column in your insert.
If you do, you should be aware that the tbl_contract.id should exist in the tbl_attactment.contract_id
Related
I have 2 tables about music: songs and images, songs stores the song id, name, year, artist, audio. Artist is an indexed field it is in the images to identify the artist image. The problem happens when i want to insert a song in songs. appears this error:
INSERT INTO `songs` (`id`, `name`, `artist`, `year`, `audio`) VALUES ('0', 'x', 'x', '1000', 'x.mp3')
#1452 - Cannot add or update a child row: a foreign key constraint fails (`audio_player`.`songs`, CONSTRAINT `songs_ibfk_1` FOREIGN KEY (`artist`) REFERENCES `images` (`artist`) ON DELETE CASCADE ON UPDATE CASCADE)
both tables are empty.
any idea?
Well, i came too late, but: the error it's because i had to insert into images before of data of artist table
I am getting this error:
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (university.registration, CONSTRAINT registration_ibfk_2 FOREIGN KEY (section_id) REFERENCES Section (section_id))
This is my code
INSERT INTO Registration VALUES (24766, 1102, 'B', 'B');
CREATE TABLE Registration (
student_id INT,
section_id INT,
midterm_grade VARCHAR(5),
final_grade VARCHAR(5),
PRIMARY KEY (student_id, section_id),
FOREIGN KEY (student_id)
REFERENCES Student (student_id),
FOREIGN KEY (section_id)
REFERENCES Section (section_id)
);
Any help would be appreciated on fixing this problem.
This is a common error in MySQL, most likey caused by either that student_id 24766 does not exist in the Student table, or section_id 1102 does not exist in the Section table.
The fix is to simply make sure that your foreign keys in the Registration table point to actual primary keys of records in the other two tables. So, you may need to insert some data to resolve this error.
Here is my erd diagram of my tables...
I am trying to INSERT VALUES into my items table using the following code...
INSERT INTO items (item, addedby, updated_at, created_at) VALUES ("one","two" NOW(), NOW())
I am getting the following error...
11:15:53 INSERT INTO items (item, addedby, updated_at, created_at) VALUES ("one", "two", NOW(), NOW()) Error Code: 1452. Cannot add or update a child row: a foreign key constraint fails (`wishlist`.`items`, CONSTRAINT `fk_items_users` FOREIGN KEY (`users_id`) REFERENCES `users` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION) 0.046 sec
Whats going on!?
When you add relations in MySQL Workbench, it creates foreign key constraints automatically. Which means you have to provide a value for users_id which corresponds to an id in your users table.
If we assume you want to add an item for the user with id 1, your statement should look like this:
INSERT INTO items (item, addedby, updated_at, created_at, users_id) VALUES ("one","two" NOW(), NOW(), 1)
For further information look up referential integrity.
If you have just added the user and don't know his id because it's an AUTO_INCREMENT value, you can use LAST_INSERT_ID() to retrieve it.
I am having trouble with the following insert query.
INSERT INTO CM_LABEL_CALENDAR (
label_id,
label_name,
order_seq,
meal_id,
hyperlink
)
SELECT
label_id,
label_name,
order_seq,
(meal_id + 315),
hyperlink
FROM
CM_LABEL_CALENDAR
WHERE
(meal_id BETWEEN '1466' AND '1521');
When I try to execute it I get the following error:
Lookup Error - MySQL Database Error: Cannot add or update a child row: a foreign key constraint fails (TEST_PBMS.CM_LABEL_CALENDAR, CONSTRAINT CM_LABEL_CALENDAR_ibfk_1 FOREIGN KEY (meal_id) REFERENCES CM_MEAL_CALENDAR (meal_id))
I've tried looking for an answer but couldn't find one.
There is a foreign key constraint between CM_LABEL_CALENDAR(meal_id) and CM_MEAL_CALENDAR(meal_id)
You are getting this error because you are trying to insert values in the meal_id column that do not exist in the CM_MEAL_CALENDAR table.
I cant figure out this error message.I know there are similar post but they have not helped.
ERROR 1452: Cannot add or update a child row: a foreign key constraint
fails (workingmodel.cadet, CONSTRAINT fk_Cadet_YEAR_t1 FOREIGN
KEY (YEAR_t_idYEAR_t) REFERENCES year_t (idYEAR_t) ON DELETE NO
ACTION ON UPDATE NO ACTION)
SQL Statement:
INSERT INTO `workingmodel`.`cadet` (`CID`, `YEAR_t_idYEAR_t`, `Rank_idRank`, `BN_idBN`, `PTscore`, `Academic_idAcademic`, `CadetLastName`, `CadetFirstName`) VALUES ('00123456', '2015', 'CPL', '2', '220', 'CS', 'Matthews', 'Bob')
It is all about Referential Integrity.
Table cadet is dependent on table year_t on column YEAR_t_idYEAR_t into column idYEAR_t.
You are inserting a value 2015 on table cadet that the value of YEAR_t_idYEAR_t doesn't exist on table year_t.
To fix your problem, you need to insert 2015 on table year_t first and execute your INSERT statement again.