So i am just a beginner in all this php stuff. I know just the basics, and when i setting up the settings for my new table, I met the problem #1075. Before, i created one, almost similar to this one, and i don't see the differenc. Can you say me where is the problem and explain what is happening?
CREATE TABLE `try`.`testing` ( `id` INT NOT NULL AUTO_INCREMENT , `date` DATE NOT NULL , `text_1` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL , `text_2` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ) ENGINE = MyISAM;
here is the code of my SQL Preview. I use phpMyAdmin, obviously.
Please, help me.
Thank, you)
Try this
CREATE TABLE `testing` (
`id` INT NOT NULL AUTO_INCREMENT,
`date` DATE NOT NULL,
`text_1` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`text_2` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
PRIMARY KEY (`id`)
) ENGINE = MYISAM ;
You have to declare your AUTO_INCREMENT field as a primary key or a key. So you have to add PRIMARY KEY (id) or KEY (id) to your CREATE TABLE statement:
CREATE TABLE `try`.`testing` (
`id` INT NOT NULL AUTO_INCREMENT,
`date` DATE NOT NULL ,
`text_1` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`text_2` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
PRIMARY KEY (`id`) -- as primary key
KEY (`id`) -- or as key
) ENGINE = MyISAM;
Please also check:
https://stackoverflow.com/a/8114994/3647441
https://stackoverflow.com/a/14087703/3647441
For an autoincrement field you should have some sort of index associated with it. eg: primary key which is missing
Try This.
CREATE TABLE `try`.`testing` (
`id` INT NOT NULL AUTO_INCREMENT,
`date` DATE NOT NULL ,
`text_1` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`text_2` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
KEY (`id`)
) ENGINE = MyISAM;
https://dev.mysql.com/doc/refman/5.6/en/example-auto-increment.html
Related
My business scenario is shown in the figure above. A user can create multiple products, a product can have multiple modules, and a module can have multiple parameters. The parameters include variable types, variable names, and variable values.
Before starting I thought the query speed of mptt was better than 2D relational table, but the result is completely opposite.
I now have two data table designs.
Option One:
CREATE TABLE `products` (
`product_id` bigint(20) NOT NULL AUTO_INCREMENT,
`product_name` varchar(30) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`cfdversion` bigint(20) NULL DEFAULT NULL,
`product_info` varchar(30) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`is_activated` tinyint(1) NULL DEFAULT NULL,
PRIMARY KEY (`product_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 226 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
CREATE TABLE `person_param` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`product_id` bigint(20) NULL DEFAULT NULL,
`param_name` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`var_type` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`var_value` varchar(30) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`var_name` varchar(30) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`is_activated` tinyint(1) NULL DEFAULT 1,
`compute_value` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`module_name` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE,
INDEX `product_id`(`product_id`) USING BTREE,
CONSTRAINT `person_param_ibfk_1` FOREIGN KEY (`product_id`) REFERENCES `products` (`product_id`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB AUTO_INCREMENT = 19 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
I connect the id of the product information with the parameter table.
Option two:
products table is same just table name is different.
person_paramlike this:
CREATE TABLE `mptt_param` (
`node_id` bigint(20) NOT NULL AUTO_INCREMENT,
`node_name` varchar(30) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`lft` bigint(20) NOT NULL,
`rgt` bigint(20) NOT NULL,
`node_level` bigint(20) NOT NULL,
PRIMARY KEY (`node_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
I added 200 products with 3 modules per product and 10 parameters per module.
option 1's sql statement:SELECT * from `products` a RIGHT JOIN `person_param` b ON a.product_id=b.product_id WHERE a.product_id=246;
option 2's sql statement:SELECT * FROM mptt_param WHERE lft>=(SELECT lft FROM mptt_param WHERE node_name='246') AND rgt<=(SELECT rgt FROM mptt_param WHERE node_name='246') ;
I don't know what the problem is, hope you can give me some advice
i want to copy 1 row from this table:
tableold
-----------
oid (primary key, auto_incremment)
name
age
detail
to this table:
tablenew
------------
nid (primary key, auto_incremment)
fid (foreign key to another table)
name
age
detail
With this SQL-Command:
INSERT INTO tablenew (tablenew.name, tablenew.age, tablenew.detail)
SELECT tableold.name, tableold.age, tableold.detail
FROM tableold
WHERE tableold.oid = 123;
But i get the error:
ERROR 1364 (HY000): Field 'fid' doesn't have a default value
Is there any possibility to manually add the foreign key 'fid' to the SQL-Command?
*Edit, i have added the CREATE table statements:
CREATE TABLE `othertable` (
`fid` int NOT NULL AUTO_INCREMENT,
`value1` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`value2` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`value3` longtext CHARACTER SET utf8 COLLATE utf8_general_ci,
`value4` longtext CHARACTER SET utf8 COLLATE utf8_general_ci,
PRIMARY KEY (`fid`),
) ENGINE=InnoDB AUTO_INCREMENT=66 DEFAULT CHARSET=utf8;
CREATE TABLE `tablenew` (
`nid` int NOT NULL AUTO_INCREMENT,
`fid` int NOT NULL,
`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`age` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`detail` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
PRIMARY KEY (`sid`),
KEY `fid_fkey` (`fid`),
CONSTRAINT `fid_fkey` FOREIGN KEY (`fid`) REFERENCES `othertable` (`fid`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;
CREATE TABLE `tableold` (
`oid` int NOT NULL AUTO_INCREMENT,
`name` varchar(60) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`age` varchar(60) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`detail` varchar(60) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
PRIMARY KEY (`oid`)
) ENGINE=InnoDB AUTO_INCREMENT=157 DEFAULT CHARSET=utf8;
I have solved it:
INSERT INTO tablenew (tablenew.fid, tablenew.name, tablenew.age, tablenew.detail)
SELECT 'value', tableold.name, tableold.age, tableold.detail
FROM tableold
WHERE tableold.oid = value;
This question already has answers here:
There can be only one auto column
(6 answers)
Closed 2 years ago.
Im using phpmyadmin for the first time and I get this error: incorrect table definition. there can be only one auto column and it must be defined as key. What am I doing wrong?
This is my code:
CREATE TABLE `database_reservering`.`formData` (
`nameTeacher` VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`nameChild` VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL , `email` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`age` INT(11) NOT NULL ,
`date` DATE NOT NULL ,
`comment` VARCHAR(300) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`id` INT(30) UNSIGNED NOT NULL AUTO_INCREMENT ,
PRIMARY KEY (`nameTeacher`)
) ENGINE = InnoDB;
The actual error message is:
Incorrect table definition; there can be only one auto column and it must be defined as a key
The problem is that you have id as auto-increment, but the primary key is on nameTeacher. This is not allowed. You can change the statement to make id the primary key, and put a unique constraint on nameTeacher. This implements the same logic, but is valid MySQL syntax:
CREATE TABLE `formData` (
...
PRIMARY KEY (`id`),
UNIQUE (`nameTeacher`)
) ENGINE = InnoDB;
Demo on DB Fiddle
Change
PRIMARY KEY (nameTeacher)
to
PRIMARY KEY (id)
Full statement:
CREATE TABLE formData (
nameTeacher VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
nameChild VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
email VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
age INT(11) NOT NULL ,
`date` DATE NOT NULL ,
`comment` VARCHAR(300) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
id INT UNSIGNED NOT NULL AUTO_INCREMENT ,
PRIMARY KEY (id)) ENGINE = InnoDB;
What do you want to achieve when PK is set to the column other than AUTO_INCREMENT?
If you want to have separate independent autoincremented sequence for each nameTeacher value then alter the engine to MyISAM and define PK like (nameTeacher, id):
CREATE TABLE `formData` (
`nameTeacher` VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`nameChild` VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`email` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`age` INT(11) NOT NULL , `date` DATE NOT NULL ,
`comment` VARCHAR(300) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`id` INT(30) UNSIGNED NOT NULL AUTO_INCREMENT ,
PRIMARY KEY (`nameTeacher`, `id`)
) ENGINE = MyISAM;
fiddle
See Using AUTO_INCREMENT for details.
when I insert data in this table, my query is
INSERT INTO urdu_word (word) VALUES ('Abdelali Abou Dher (عبد العالي ابو ذر)') ON DUPLICATE KEY UPDATE word='Abdelali Abou Dher (عبد العالي ابو ذر)' word value replace to like ???
My table structure is:
CREATE TABLE `urdu_word` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`word` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `word` (`word`),
KEY `idx_aml_word_status` (`word`)
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
I also tried to chage table structure to utf8_unicode_ci but same problem facing
CREATE TABLE `aml_word` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`word` varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `word` (`word`),
KEY `idx_aml_word_status` (`word`)
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
mysql version 5.6
when insert query run in mysql command line then it inserted well in urdu but when I inserted through code using mybatis ORM then create problem.
The default character set for MySQL at (mt) Media Temple is latin1,
with a default collation of latin1_swedish_
So you need to change your callation
Try with this query
ALTER DATABASE dbname CHARACTER SET utf8 COLLATE utf8_general_ci;
Followed by this tutorial
https://mediatemple.net/community/products/dv/204403914/default-mysql-character-set-and-collation#gs
I'm currently moving my concrete5.7 setup from localhost to a live server. First thing I did was export the SQL database and import it on the server, however this is giving me an error:
Error
SQL query:
-- --------------------------------------------------------
--
-- Tabelstructuur voor tabel `config`
--
CREATE TABLE IF NOT EXISTS `config` (
`configNamespace` VARCHAR( 255 ) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
`configGroup` VARCHAR( 255 ) COLLATE utf8_unicode_ci NOT NULL ,
`configItem` VARCHAR( 255 ) COLLATE utf8_unicode_ci NOT NULL ,
`configValue` LONGTEXT COLLATE utf8_unicode_ci,
PRIMARY KEY ( `configNamespace` , `configGroup` , `configItem` ) ,
KEY `configGroup` ( `configGroup` )
) ENGINE = INNODB DEFAULT CHARSET = utf8 COLLATE = utf8_unicode_ci;
MySQL said:
#1071 - Specified key was too long; max key length is 1000 bytes
I'm aware that the key is too long but is there any freedom to change? I've tried changing the database collation to latin1 but it did not work.
What settings can I change?
Thank you for any feedback
That is a poor choice of primary key - you do not need 1000 bytes of entropy to make a row unique
If there is no natural choice of primary key, you can generate a surrogate key for the row.
e.g. replace
PRIMARY KEY ( `configNamespace` , `configGroup` , `configItem` ) ,
with
configId INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
This should not be a breaking change for an application which uses the above.
I would recommend the following structure:
CREATE TABLE IF NOT EXISTS `config` (
configId int not null auto_increment primary key,
configNamespace VARCHAR( 255 ) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
configGroup VARCHAR( 255 ) COLLATE utf8_unicode_ci NOT NULL ,
configItem VARCHAR( 255 ) COLLATE utf8_unicode_ci NOT NULL ,
configValue LONGTEXT COLLATE utf8_unicode_ci,
UNIQUE (configNamespace, configGroup, configItem) ,
KEY `configGroup` ( `configGroup` )
) ENGINE = INNODB DEFAULT CHARSET = utf8 COLLATE = utf8_unicode_ci;
This creates the auto-incremented primary key for the table. In addition, it keeps the unique constraint on the three columns previously used for the primary key.