How Can I Fix Mysqlimport Error 1452?
January 12, 2022
In this article, we are going to reveal some of the possible causes that can cause the mysqlimport error 1452, and after that, we will offer you possible fixes that you can try to fix the problem.
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MySQL error 1452. Can’t update child row otherwise: some foreign key constraints don’t work? This error occurs whenever we add a currency key constraint between tables and add records to the child table. The error occurs when you usually try to add a row that does not have a matching row in another table.
I wrote a Perl script that creates the registration scheme:
CREATE TABLE descType ( Detect unsigned MEDIUM PRIMARY KEY, descr MEDIUMTEXT) ENGINE = InnoDB;control type CREATE TABLE ( ID MEDIUMINT PRIMARY KEY unsigned, descr TEXT non-zero) ENGINE = InnoDB;CREATE TABLE Inner diameter INT unsigned PRIMARY KEY, seqId varchar (50) is almost zero, unsigned MEDIUMINT descId is not always null, MEDIUMINT unsigned non-zero, non-zero unsigned MEDIUMINT taxId, repId varchar (50) is not actually zero, Foreign KEY (descId) REFERENCES descType (id), FOREIGN KEY REFERENCES (taxId) taxType (id), unique (seqId) ) ENGINE = InnoDB;system qq (mysqlimport -u $ mySqlUser -p $ mySqlPass $ database $ table --local --fields-terminated-by = " t" --lines-terminated-by = " r n ")) == 0 or "ERROR: An error occurred while publishing table $ to database $. $?" ;mysqlimport: error: 1452, cannot be added Add or update child row: foreign keyConstraint error (`uniref_2013_08`.`uniref`, CONSTRAINT` uniref_ibfk_1` KEYExternal (`descId`) REFERENCES` descType` (` id`)) when usedTable: no linkRecommended: Fortect
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To know about error 1452, we must first organize the table and link it to actually get another table.using foreign key constraints.
mysql> CREATE ForeignTable-> (-> id interval,-> varchar name (200),-> Integer Fk_pk->);Request OK, serial number 0 (assigned 0.43 seconds)Disable important foreign review The second way will eliminateь ERROR 1452 - Disable the FOREIGN_KEY_CHECKS variable on your MySQL server. This variable is created by MySQL to check for any external Paramount constraints added to your table (s) before adding or updating them now.
After successfully creating the first regular table, we create an additional table '
mysql> CREATE PrimaryTable1-> (-> integer Fk_pk,-> Department name varchar (200),-> primary key (Fk_pk)->);Request 0 ok, lines affect (0.48 sec.)We have now created two game tables. Then the two tables are updated using age. the borderCommand in a role to add foreign key constraints. The syntax is the same as the counter
alter table yourFirstTable Add Constraint anyConstraintName Overseas key (column name,deals with foreign key in second table) yourSecondTable (column_name deals with primary key in second table)second table).It is unlikely that you will be able to add an update to a child row: Forex key constraint mostly fails when you try to add a specific row to your Ordrelinje table, which usually does not have a matching row (OrderID) in the Order table. It is very important to insert the row into the record table first.
The above query should now be used to join the two current tables. This is listed as using '
mysql> alter table Add ForeignTable refers to key constFKPK (Fk_pk) External linksMainTable1 (Fk_pk);Request OK, line not touched (1.57 s)Records: 0 Duplicates: Warnings: 0 0The two poker tables are now linked. Records are inserted into the "foreignTable" table asfollows
mysql> INSERT ForeignTable in values (1, 'John', 1);
This results in an error that appears in the following output â ’
ERROR 1452 (23000): Unable to add or update small row: foreign key error(`business`.` foreign`, CONSTRAINT` constFKPK` FOREIGN KEY (` Fk_pk`)REFERENCES `primarytable1` (` fk_pk`))In the above output, we usually get the error "Unable to update or enter child row: forex key".The limitation does not work. " We can remove the accidental insertion of records into the PrimaryTable1 table.as shown according to â € ’
mysql> INSERT into pri valuesmaryTable1 (1, 'ComputerScience');Request OK, only one line affected (0.14 sec.)After inserting my table into PrimaryTable1, almost anyone can insert what the records requireForeignTable with no errors. This is shown below INSERT '
mysql> for ForeignTable values (1, 'John', 1);Request OK, 1 line broken (0.13 sec.)
We can now normally display each of our table records from the ForeignTable using the select command,which can be read like this: '
mysql> SELECT * in the hands of ForeignTable;The easiest way is to turn off the check of the main foreigner; Make your changes, so re-enable foreign key validation. With all of your current (possibly flawed) design, you need to remove a row from the General Advertisers table before you can remove the row on the production computer it refers to.
+ ------ + ------ + ------- +| ID | Name | Fk_pk |+ ------ + ------ + ------- +| 1 | John | 1. |+ ------ + ------ + ------- +Only 1 row (0.00 sec.)We can also display the Primarytable1 record table to support the "set to" command.this is the next â ’
SELECT
mysql> 3.from main table1;
+ ------- + ------------------ +| Fk_pk | Department name |+ ------- + ------------------ +| 1 | IT |+ ------- + ------------------ +1 line in selection (0.sec) Error 00 1452. Unable to add or update short minor time period: Foreign key constraint does not work the first time a record in a foreign table is used.
Note. First insert all data records into a second table like Primarytable1 to avoid the above error.
Related FAQs MySQL Error 1452. Unable to validate or update child row: Is some foreign key constraint not working? How can I just add a FOREIGN KEY constraint to some of the to fields of an existing MySQL table? When it comes to EXTERNAL KEY, what relationship currently exists between MySQL parents and small tables? How can we remove the FOREIGN KEY constraint from a column in a previous MySQL table? Download this software and fix your PC in minutes.Mysqlimport Fehler 1452
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