i have problem in mysql field is " the class name " I'm Arabic man so our class name
like that :11D2 assume that D is Arabic letter , but I'm mysql field it appears like that "112D" cuz my Arabic language start from Right to left .
so i want to ask how to fix it and store it like 11D2
CREATE TABLE `class` (
`CLASS_ID` int(10) unsigned NOT NULL AUTO_INCREMENT,
`CLASS_NAME` varchar(45) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
`Grade_id` int(10) unsigned NOT NULL,
`Stage_id` int(10) unsigned NOT NULL,
`school_id` int(10) unsigned NOT NULL,
PRIMARY KEY (`CLASS_ID`),
KEY `school_ids3` (`school_id`),
KEY `grade_ids` (`Grade_id`) USING BTREE,
KEY `stage_ids2` (`Stage_id`) USING BTREE,
CONSTRAINT `grade_id4` FOREIGN KEY (`Grade_id`) REFERENCES `grade` (`Grade_id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `school_id8` FOREIGN KEY (`school_id`) REFERENCES `schools` (`school_id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `stage_id3` FOREIGN KEY (`Stage_id`) REFERENCES `stage` (`STAGE_ID`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB AUTO_INCREMENT=20 DEFAULT CHARSET=utf8
Related
I have 2 tables like these:
'CREATE TABLE `preoperativeassessments` (
`Id` char(36) NOT NULL,
`SurgeonName` varchar(100) NOT NULL,
`SurgeonExperience` int(11) DEFAULT NULL,
`AnesthetistName` varchar(100) DEFAULT NULL,
`DateOfBirthYear` int(11) DEFAULT NULL,
`Gender` int(11) DEFAULT NULL,
`Status` int(11) DEFAULT NULL,
`SurgeryDate` datetime(6) DEFAULT NULL,
`HospitalId` varchar(20) NOT NULL,
`PatientId` varchar(50) NOT NULL,
`SurgeonId` bigint(20) NOT NULL,
`TheaterId` varchar(16) DEFAULT NULL,
`AssessmentDate` datetime(6) DEFAULT NULL,
`BodyStructureId` int(11) NOT NULL,
`MethodId` varchar(100) DEFAULT NULL,
`EthnicityId` int(11) DEFAULT NULL,
PRIMARY KEY (`Id`),
KEY `FK_PreOperativeAssessments_Hospitals_HospitalId_idx` (`HospitalId`),
KEY `FK_PreOperativeAssessments_Patients_PatientId_idx` (`PatientId`),
KEY `FK_PreOperativeAssessments_Users_SurgeonId_idx` (`SurgeonId`),
KEY `FK_PreOperativeAssessments_BodyStructures_BodyStructureId_idx` (`BodyStructureId`),
CONSTRAINT `FK_PreOperativeAssessments_BodyStructures_BodyStructureId` FOREIGN KEY (`BodyStructureId`) REFERENCES `bodystructures` (`Id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `FK_PreOperativeAssessments_Hospitals_HospitalId` FOREIGN KEY (`HospitalId`) REFERENCES `hospitals` (`Id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `FK_PreOperativeAssessments_Patients_PatientId` FOREIGN KEY (`PatientId`) REFERENCES `patients` (`Id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `FK_PreOperativeAssessments_Users_SurgeonId` FOREIGN KEY (`SurgeonId`) REFERENCES `abpusers` (`Id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB DEFAULT CHARSET=latin1'
CREATE TABLE `ethnicities` (
`Id` int(11) NOT NULL,
`Description` varchar(100) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
and I try to add foreign key constraint using this:
ALTER TABLE casemix.preoperativeassessments ADD CONSTRAINT FK_PreOperativeAssessments_Ethnicities_EthnicityId FOREIGN KEY (EthnicityId) REFERENCES casemix.ethnicities (Id) ON UPDATE NO ACTION ON DELETE CASCADE
But I keep getting this error: "Error Code: 1215. Cannot add foreign key constraint"
What could be the issue here?
'InnoDB permits a foreign key to reference any index column or group of columns. However, in the referenced table, there must be an index where the referenced columns are the first columns in the same order.' - https://dev.mysql.com/doc/refman/8.0/en/create-table-foreign-keys.html or a primary key
I'm very new in MySQL and im making a school project. I have this table:
CREATE TABLE IF NOT EXISTS `Reserva` (
`idReservacion` int(10) NOT NULL AUTO_INCREMENT,
`importe` int(10) DEFAULT NULL,
`fecha` date DEFAULT NULL,
`idCliente` int(11) DEFAULT NULL,
PRIMARY KEY (`idReservacion`),
KEY `idCliente` (`idCliente`),
CONSTRAINT `Reserva_ibfk_1` FOREIGN KEY (`idCliente`) REFERENCES `Cliente` (`idcliente`)
) ENGINE=InnoDB AUTO_INCREMENT=60001 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
And im triying to make Importe a generated field by an update using the next tables
CREATE TABLE IF NOT EXISTS `PaseDeAbordar` (
`idPaseDeAbordar` int(11) NOT NULL AUTO_INCREMENT,
`hora` time DEFAULT NULL,
`idReservacion` int(5) NOT NULL,
`idAsiento` varchar(5) COLLATE utf8_unicode_ci NOT NULL,
`idVuelo` int(11) NOT NULL,
`precioc` int(10) DEFAULT NULL,
PRIMARY KEY (`idPaseDeAbordar`),
KEY `idReservacion` (`idReservacion`),
KEY `idAsiento` (`idAsiento`),
KEY `idVuelo` (`idVuelo`),
CONSTRAINT `PaseDeAbordar_ibfk_1` FOREIGN KEY (`idVuelo`) REFERENCES `Vuelo` (`idvuelo`),
CONSTRAINT `PaseDeAbordar_ibfk_2` FOREIGN KEY (`idReservacion`) REFERENCES `Reservacion` (`idreservacion`),
CONSTRAINT `PaseDeAbordar_ibfk_3` FOREIGN KEY (`idAsiento`) REFERENCES `Asiento` (`idasiento`)
) ENGINE=InnoDB AUTO_INCREMENT=225001 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
Pasedeabordar has the foreign keys from Vuelo and Asiento, this is the structure of those:
CREATE TABLE IF NOT EXISTS `Asiento` (
`idAsiento` varchar(5) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
`idClase` int(11) NOT NULL,
`precio` int(11) NOT NULL,
PRIMARY KEY (`idAsiento`),
KEY `idClase` (`idClase`),
CONSTRAINT `Asiento_ibfk_1` FOREIGN KEY (`idClase`) REFERENCES `Clase` (`idclase`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
Vuelo:
CREATE TABLE IF NOT EXISTS `Vuelo` (
`idVuelo` int(8) NOT NULL AUTO_INCREMENT,
`matriculaAvion` varchar(10) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
`origen` varchar(4) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
`destino` varchar(4) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
`fechaVuelo` date NOT NULL,
`horaSalida` time NOT NULL,
`horaLlegada` time NOT NULL,
`duracion` time NOT NULL,
`tieneEscala` varchar(2) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT 'NO',
`precio` int(10) NOT NULL,
PRIMARY KEY (`idVuelo`),
KEY `origen` (`origen`),
KEY `destino` (`destino`),
KEY `matriculaAvion` (`matriculaAvion`),
CONSTRAINT `Vuelo_ibfk_1` FOREIGN KEY (`origen`) REFERENCES `Terminal` (`idterminal`),
CONSTRAINT `Vuelo_ibfk_2` FOREIGN KEY (`destino`) REFERENCES `Terminal` (`idterminal`),
CONSTRAINT `Vuelo_ibfk_3` FOREIGN KEY (`matriculaAvion`) REFERENCES `Avion` (`matricula`)
) ENGINE=InnoDB AUTO_INCREMENT=5501 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
Importe is suposed to be generated on this way:
reservacion.importe=(precio from asiento+precio from vuelo) where paseabordar.reservacionid=importe.reservacionid
UPDATE reservacion r, pasedeabordar pa, vuelo v, asiento a
SET r.importe=SUM(v.precio+a.precio)
WHERE pa.idreservacion=r.idreservacion
AND pa.idAsiento=a.idAsiento
AND pa.idVuelo=v.idVuelo;
But this generates me an error
Error(1111): Invalid use of group function
Any ideas on what im doing wrong?
SUM() is a group function, which is used to add up cells from the same column. You are simply trying to add up two values from the same row.
r.importe=v.precio+a.precio should work.
By the way, it's considered good practice to join your tables explicitly, like this:
UPDATE reservacion r
JOIN pasedeabordar pa ON pa.idreservacion = r.idreservacion
JOIN vuelo v ON pa.idVuelo = v.idVuelo
JOIN asiento a ON pa.idAsiento = a.idAsiento
SET r.importe = v.precio + a.precio;
I run the following query:
SELECT name FROM shops ORDER BY name;
The current result:
ABC shop
ÁDE shop
ALT shop
Expected result should be:
ABC shop
ALT shop
ÁDE shop
Looks like A and Á are equal. (Correct order: a < á < e < é < o < ó < ö...)
I tried to use hungarian collation (with mysql 8.0.17):
ALTER DATABASE mydb CHARACTER SET utf8mb4 COLLATE utf8mb4_hu_0900_ai_ci;
I found that the mysql team have fixed this issue in mysql 8.0.1: https://bugs.mysql.com/bug.php?id=12519
SHOW CREATE TABLE shops;
| shops | CREATE TABLE `shops` (
`id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
`address_id` bigint(20) unsigned DEFAULT NULL,
`shop_category_id` bigint(20) unsigned DEFAULT NULL,
`shop_chain_id` bigint(20) unsigned DEFAULT NULL,
`created_at` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT NULL,
`partner_id` bigint(20) unsigned DEFAULT NULL,
`location_id` bigint(20) unsigned DEFAULT NULL,
`is_active` tinyint(1) NOT NULL DEFAULT '1',
`user_id` bigint(20) unsigned DEFAULT NULL,
`deputy_user_id` bigint(20) unsigned DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `shops_address_id_foreign` (`address_id`),
KEY `shops_shop_category_id_foreign` (`shop_category_id`),
KEY `shops_shop_chain_id_foreign` (`shop_chain_id`),
KEY `shops_partner_id_foreign` (`partner_id`),
KEY `shops_location_id_foreign` (`location_id`),
KEY `shops_user_id_foreign` (`user_id`),
KEY `shops_deputy_user_id_foreign` (`deputy_user_id`),
CONSTRAINT `shops_address_id_foreign` FOREIGN KEY (`address_id`) REFERENCES `addresses` (`id`) ON DELETE SET NULL,
CONSTRAINT `shops_deputy_user_id_foreign` FOREIGN KEY (`deputy_user_id`) REFERENCES `users` (`id`) ON DELETE SET NULL,
CONSTRAINT `shops_location_id_foreign` FOREIGN KEY (`location_id`) REFERENCES `locations` (`id`) ON DELETE SET NULL,
CONSTRAINT `shops_partner_id_foreign` FOREIGN KEY (`partner_id`) REFERENCES `partners` (`id`) ON DELETE CASCADE,
CONSTRAINT `shops_shop_category_id_foreign` FOREIGN KEY (`shop_category_id`) REFERENCES `shop_categories` (`id`) ON DELETE SET NULL,
CONSTRAINT `shops_shop_chain_id_foreign` FOREIGN KEY (`shop_chain_id`) REFERENCES `shop_chains` (`id`) ON DELETE SET NULL,
CONSTRAINT `shops_user_id_foreign` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE SET NULL
) ENGINE=InnoDB AUTO_INCREMENT=564 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_hu_0900_ai_ci
No simple solution:
Plan A: Write your own collation.
Plan B: Write a bug at bugs.mysql.com complaining that even in 8.0.17, utf8mb4_hu_0900_ai_ci is "incorrect".
(Meanwhile, I suspect utf8mb4_hungarian_ci was left with the 5.7 collation for backward compatibility.)
The question itself is wrong. The expected result is:
ABC shop
ÁDE shop
ALT shop
and it's right.
https://helyesiras.mta.hu/helyesiras/default/akh12#F2_4
I'm quite new to SQL, and I'm trying to upload data to my tables. For this I have special tables where I upload the data from a CSV file, and then, from this table, I am trying to copy the data to the final table.
But now I have a problem with an intermediate table where I have uploaded my data. The table is:
CREATE TABLE `_work_has_person` (
`work_id` int(11) NOT NULL,
`person_id` int(11) NOT NULL,
`primary_contribution_id` int(11) DEFAULT NULL,
PRIMARY KEY (`work_id`,`person_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
I want to copy the data in
CREATE TABLE `work_has_person` (
`work_id` int(11) NOT NULL,
`person_id` int(11) NOT NULL,
`primary_contribution_id` int(11) NOT NULL,
PRIMARY KEY (`work_id`,`person_id`),
KEY `fk_work_has_person_person1_idx` (`person_id`),
KEY `fk_work_has_person_work1_idx` (`work_id`),
KEY `fk_work_has_person_primary_contribution1_idx` (`primary_contribution_id`),
CONSTRAINT `fk_work_has_person_person1` FOREIGN KEY (`person_id`) REFERENCES `person` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `fk_work_has_person_primary_contribution1` FOREIGN KEY (`primary_contribution_id`) REFERENCES `primary_contribution` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `fk_work_has_person_work1` FOREIGN KEY (`work_id`) REFERENCES `work` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Which is an intermediate table between:
CREATE TABLE `work` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`title_work` varchar(250) DEFAULT NULL,
`subtitle_work` varchar(250) DEFAULT NULL,
`date_work` varchar(45) DEFAULT NULL,
`unix_date_work` varchar(100) DEFAULT NULL,
`sinopsis` text,
`ref_bne` varchar(100) DEFAULT NULL,
`ref_alt` longtext,
`language_id` int(11) NOT NULL,
PRIMARY KEY (`id`),
KEY `fk_work_language1_idx` (`language_id`),
KEY `title_work` (`title_work`),
CONSTRAINT `fk_work_language1` FOREIGN KEY (`language_id`) REFERENCES `language` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB AUTO_INCREMENT=24610 DEFAULT CHARSET=utf8;
and
CREATE TABLE `person` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(100) NOT NULL,
`img_person` varchar(250) DEFAULT NULL,
`born_date` varchar(45) DEFAULT NULL,
`unix_born_date` varchar(100) DEFAULT NULL,
`city_born_date` varchar(100) DEFAULT NULL,
`country_born_date` varchar(100) DEFAULT NULL,
`death_date` varchar(45) DEFAULT NULL,
`unix_death_date` varchar(100) DEFAULT NULL,
`city_death_date` varchar(100) DEFAULT NULL,
`country_death_date` varchar(45) DEFAULT NULL,
`biography` longtext,
`ref_bne` varchar(100) DEFAULT NULL,
`ref_alt` longtext,
PRIMARY KEY (`id`),
UNIQUE KEY `name_UNIQUE` (`name`),
KEY `name` (`name`)
) ENGINE=InnoDB AUTO_INCREMENT=9159 DEFAULT CHARSET=utf8;
But everytime I try to run
INSERT INTO work_has_person (work_id, person_id, primary_contribution_id)
SELECT work_id, person_id, primary_contribution_id
FROM _work_has_person;
It says
Cannot add or update a child row: a foreign key constraint fails (`cdu93hfg93r`.
`work_has_person`, CONSTRAINT `fk_work_has_person_person1` FOREIGN KEY (`person_id`)
REFERENCES `person` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION)
I am pretty sure that the tables has the neccesary data, but, ¿is there a way to know which data fails? I have seen Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails: but don't understand exactly how to use it here.
A.
It is relatively easy to find out what data is causing the conflict: get all person_ids from _work_has_person that are not in the persons table. You can achieve this via an outer join and filtering for person.id is null in the where clause.
select * from `_work_has_person` whp
left join person p on whp.person_id=p.id
where p.id is null
You can actually remove such data from the results being inserted by including the reverse criterion into the select part of your insert query (an inner join):
INSERT INTO work_has_person (work_id, person_id, primary_contribution_id)
SELECT whp.work_id, whp.person_id, whp.primary_contribution_id
FROM _work_has_person whp
INNER join person p on whp.person_id=p.id
Not sure what else to check/do. I made sure the foreign key data type matches (char(36)) and I ensured the foreign key statement uses the correct syntax
Running this script i get error 1215
USE addm;
CREATE TABLE `addm`.`notificationResource` (
`notificationId` CHAR(36) NOT NULL ,
`resourceId` CHAR(36) NOT NULL ,
PRIMARY KEY (`notificationId`, `resourceId`) ,
INDEX `fk_notificationResource_notification_idx` (`notificationId` ASC) ,
INDEX `fk_notificationResource_resource_idx` (`resourceId` ASC) ,
CONSTRAINT `fk_notificationResource_notification`
FOREIGN KEY (`notificationId` )
REFERENCES `addm`.`notification` (`id` )
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_notificationResource_resource`
FOREIGN KEY (`resourceId` )
REFERENCES `addm`.`resource` (`resourceId` )
ON DELETE NO ACTION
ON UPDATE NO ACTION);
commit;
Parent Tables:
CREATE TABLE `resource` (
`resourceId` char(36) NOT NULL,
`resourceName` varchar(255) DEFAULT NULL,
`resourceData` longblob,
PRIMARY KEY (`resourceId`),
UNIQUE KEY `resourceName_UNIQUE` (`resourceName`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8$$
CREATE TABLE `notification` (
`notificationType` varchar(5) CHARACTER SET latin1 NOT NULL,
`id` char(36) CHARACTER SET latin1 NOT NULL,
`aborted` bit(1) DEFAULT NULL,
`attempts` int(11) DEFAULT NULL,
`content` longblob,
`recordDate` datetime DEFAULT NULL,
`sent` bit(1) DEFAULT NULL,
`sentDate` datetime DEFAULT NULL,
`subject` varchar(255) CHARACTER SET latin1 DEFAULT NULL,
`fromUser_id` bigint(20) DEFAULT NULL,
`toUser_id` bigint(20) DEFAULT NULL,
`attachmentName` varchar(100) CHARACTER SET latin1 DEFAULT NULL,
`attachmentData` longblob,
`category` varchar(255) CHARACTER SET latin1 DEFAULT NULL,
`read` tinyint(1) DEFAULT '0',
`locked` tinyint(1) DEFAULT '0',
PRIMARY KEY (`id`),
KEY `FK2D45DD0B7F734EAD` (`toUser_id`),
KEY `FK2D45DD0BE62E629E` (`fromUser_id`),
CONSTRAINT `FK2D45DD0B7F734EAD` FOREIGN KEY (`toUser_id`) REFERENCES `user` (`id`),
CONSTRAINT `FK2D45DD0BE62E629E` FOREIGN KEY (`fromUser_id`) REFERENCES `user` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8$$
I think column CHARACTER SET is different. id char(36) CHARACTER SET latin1 NOT NULL
change CHARACTER SET