I created a table in a MySQL database via the following:
CREATE TABLE `newsubscriptions_orderspecification` (
`id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,
`display_name` varchar(256) NOT NULL,
`sub_def_id` integer UNSIGNED NOT NULL,
`source_code_id` integer UNSIGNED NOT NULL,
`order_code_id` integer UNSIGNED NOT NULL,
`rate` numeric(5, 2) NOT NULL,
`type` varchar(4) NOT NULL,
`region` varchar(4) NOT NULL,
`term` varchar(4) NOT NULL,
`buyer_type` varchar(4) NOT NULL,
`is_active` bool NOT NULL,
UNIQUE (`sub_def_id`, `buyer_type`, `rate`, `is_active`)
)
;
How can I remove the uniqueness constraint?
use this:
ALTER TABLE `newsubscriptions_orderspecification` DROP INDEX `sub_def_id`
Related
What is wrong with this MySQL table script code?:
CREATE TABLE `securities_master`.`symbol` (
`id` INT NOT NULL,
`exchange_id` INT NULL,
`ticker` VARCHAR(32) NOT NULL,
`instrument` VARCHAR(64) NOT NULL,
`name` VARCHAR(255) NULL,
`sector` VARCHAR(255) NULL,
`currency` VARCHAR(32) NULL,
`created_date` DATETIME NOT NULL,
`last_updated_date` DATETIME NOT NULL,
PRIMARY KEY (`id`), FOREIGN KEY 'index_exchange_id' ('exchange_id'))
ENGINE = InnoDB AUTO_INCREMENT = 1
DEFAULT CHARACTER SET = utf8;
I think it is the "FOREIGN KEY" but I am not sure
Single quotes denote string literals in SQL. Object names (such as the constraint name and the columns it refers to) should be denoted with backticks, or nothing at all:
CREATE TABLE `securities_master`.`symbol` (
`id` INT NOT NULL,
`exchange_id` INT NULL,
`ticker` VARCHAR(32) NOT NULL,
`instrument` VARCHAR(64) NOT NULL,
`name` VARCHAR(255) NULL,
`sector` VARCHAR(255) NULL,
`currency` VARCHAR(32) NULL,
`created_date` DATETIME NOT NULL,
`last_updated_date` DATETIME NOT NULL,
PRIMARY KEY (`id`),
FOREIGN KEY `index_exchange_id` (`exchange_id`)
-- Here ----^-----------------^--^-----------^
)
ENGINE = InnoDB AUTO_INCREMENT = 1
DEFAULT CHARACTER SET = utf8;
Here is the script I am trying to run
CREATE TABLE IF NOT EXISTS `store` (
`store_id` INT NOT NULL AUTO_INCREMENT,
`store_name` VARCHAR(1024) NOT NULL,
`store_user` INT NOT NULL,
`store_address` INT NOT NULL,
`store_type` INT NOT NULL,
`created_date` DATETIME NOT NULL,
`updated_date` DATETIME NOT NULL,
PRIMARY KEY (`store_id`)
ENGINE = InnoDB;
CREATE TABLE IF NOT EXISTS `store_address` (
`address_id` INT NOT NULL AUTO_INCREMENT,
`address_line_1` VARCHAR(1024) NOT NULL,
`address_line_2` VARCHAR(1024) NOT NULL,
`address_line_3` VARCHAR(1024) NULL,
`city` VARCHAR(45) NOT NULL,
`locality` VARCHAR(100) NOT NULL,
`pincode` CHAR(6) NOT NULL,
`latitude` DECIMAL(8,6) NULL,
`longitude` DECIMAL(9,6) NULL,
`state` VARCHAR(45) NOT NULL,
`created_date` DATETIME NOT NULL,
`updated_date` DATETIME NOT NULL,
PRIMARY KEY (`address_id`),
CONSTRAINT `FK_STR_STR_ADR`
FOREIGN KEY (`address_id`)
REFERENCES `store` (`store_address`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
I get this error - Error Code: 1215. Cannot add foreign key constraint
No clue what is wrong with the DDL
Two issues:
1. use unsigned int for the primary keys (Edit: this is a good idea but was not the problem)
2. the store.store address must be a key in the store table in order to use it in a foreign key constraint in the store_address table
CREATE TABLE IF NOT EXISTS `store` (
`store_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`store_name` VARCHAR(1024) NOT NULL,
`store_user` INT NOT NULL,
`store_address` int(10) unsigned NOT NULL DEFAULT 0,
`store_type` INT NOT NULL,
`created_date` DATETIME NOT NULL,
`updated_date` DATETIME NOT NULL,
PRIMARY KEY (`store_id`),
KEY (`store_address`)
) ENGINE = InnoDB;
CREATE TABLE IF NOT EXISTS `store_address` (
`address_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`address_line_1` VARCHAR(1024) NOT NULL,
`address_line_2` VARCHAR(1024) NOT NULL,
`address_line_3` VARCHAR(1024) NULL,
`city` VARCHAR(45) NOT NULL,
`locality` VARCHAR(100) NOT NULL,
`pincode` CHAR(6) NOT NULL,
`latitude` DECIMAL(8,6) NULL,
`longitude` DECIMAL(9,6) NULL,
`state` VARCHAR(45) NOT NULL,
`created_date` DATETIME NOT NULL,
`updated_date` DATETIME NOT NULL,
PRIMARY KEY (`address_id`),
CONSTRAINT `FK_STR_STR_ADR` FOREIGN KEY (`address_id`) REFERENCES `store` (`store_address`)
)ENGINE = InnoDB;
In Mysql, ID is Auto Increment but when converted to Postgres there is no Auto Increment .
Mysql database
CREATE TABLE IF NOT EXISTS `cities` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`state_id` bigint(20) NOT NULL,
`district_id` bigint(20) NOT NULL,
`name` varchar(255) NOT NULL,
`description` varchar(1000) DEFAULT NULL,
`created_by` int(11) NOT NULL,
`modified_by` int(11) DEFAULT NULL,
`is_active` char(1) NOT NULL DEFAULT 'Y',
`created` datetime DEFAULT NULL,
`modified` datetime DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `state_id` (`state_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=26 ;
After Converted to postgres database
CREATE TABLE cities (
"id" bigint NOT NULL,
state_id bigint NOT NULL,
district_id bigint NOT NULL,
"name" varchar(255) NOT NULL,
description varchar(1000),
created_by int NOT NULL,
modified_by int,
is_active char(1) NOT NULL,
created timestamp,
modified timestamp,
PRIMARY KEY ("id")
);
INSERT INTO cities(state_id, district_id, city_type, name, description,
created_by, modified_by, is_active, created, modified)
VALUES
(1, 1, '', 'Ramtek', null, 1, null, 'Y',
'2015-04-16 10:44:11', '2015-04-16 10:44:11');
You could use bigserial in such cases. It provides an auto increment feature in postgres:
CREATE TABLE cities (
"id" bigserial PRIMARY KEY,
Not Null constraint is provided by default.
Docs : http://www.postgresql.org/docs/current/static/datatype.html#DATATYPE-SERIAL
I have the following SELECT query with table joins and it taking about a minute to return 6 records:
SELECT * FROM specimen, topography_index, morphology, specimen_image_lookup, image
WHERE
SUBSTRING(specimen.topography_index, 2, 2) = topography_index.topography_index_code
AND
morphology.morphology_code = specimen.snop_code
AND
specimen_image_lookup.specimen_fk = specimen.specimen_pk
AND
image.image_pk = specimen_image_lookup.image_fk
AND
specimen.topography_index, 2, 2) IN('".implode("','",$system)."')
Any ideas what I should here?
Table structures are:
CREATE TABLE `specimen` (
`specimen_pk` int(4) NOT NULL AUTO_INCREMENT,
`number` varchar(20) NOT NULL,
`unit_number` varchar(10) NOT NULL,
`topography_index` varchar(5) NOT NULL DEFAULT '',
`snop_axis` char(1) NOT NULL,
`snop_code` varchar(4) NOT NULL,
`example` int(2) NOT NULL,
`gender` char(1) NOT NULL,
`age` varchar(3) NOT NULL DEFAULT 'NA',
`clinical_history` text NOT NULL,
`specimen` text NOT NULL,
`macroscopic` text NOT NULL,
`microscopic` text NOT NULL,
`conclusion` text NOT NULL,
`comment` text NOT NULL,
`room` char(1) NOT NULL,
`position` varchar(8) NOT NULL,
`created` datetime NOT NULL,
`created_by` int(3) NOT NULL,
`updated` datetime NOT NULL,
`updated_by` int(3) NOT NULL,
PRIMARY KEY (`specimen_pk`),
FULLTEXT KEY `clinical_history` (`clinical_history`),
FULLTEXT KEY `specimen` (`specimen`),
FULLTEXT KEY `macroscopic` (`macroscopic`),
FULLTEXT KEY `microscopic` (`microscopic`),
FULLTEXT KEY `conclusion` (`conclusion`),
FULLTEXT KEY `comment` (`comment`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=500 ;
CREATE TABLE `topography_index` (
`topography_index_pk` int(3) NOT NULL AUTO_INCREMENT,
`topography_index_code` varchar(2) DEFAULT NULL,
`topography_index_nomen` text,
PRIMARY KEY (`topography_index_pk`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=138 ;
CREATE TABLE `specimen_image_lookup` (
`specimen_image_lookup_pk` int(8) NOT NULL AUTO_INCREMENT,
`specimen_fk` int(4) NOT NULL,
`image_fk` int(4) NOT NULL,
PRIMARY KEY (`specimen_image_lookup_pk`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=141 ;
CREATE TABLE `morphology` (
`morphology_pk` int(6) NOT NULL AUTO_INCREMENT,
`morphology_code` varchar(4) NOT NULL,
`morphology_nomen` varchar(120) NOT NULL,
PRIMARY KEY (`morphology_pk`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=2295 ;
CREATE TABLE `image` (
`image_pk` int(4) NOT NULL AUTO_INCREMENT,
`image_title` varchar(80) NOT NULL,
`image_description` text NOT NULL,
`image_thumbnail` varchar(100) NOT NULL,
`image_small` varchar(100) NOT NULL,
`image_large` varchar(100) NOT NULL,
`created` datetime NOT NULL,
`created_by` int(3) NOT NULL,
`updated` datetime NOT NULL,
`updated_by` int(3) NOT NULL,
PRIMARY KEY (`image_pk`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=138 ;
By performing a substring on specimen.topography_index, you're asking the database to perform that calculation on every row in the specimen table before finding if the value exists in topography_index. One way to address this is to store the actual integer value that will match with topography_index, rather than a string with that value embedded.
CREATE TABLE IF NOT EXISTS `servergraph_server` (
`id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
`name` VARCHAR(64) NOT NULL,
`ip` VARCHAR(16) NOT NULL,
`port` SMALLINT UNSIGNED NOT NULL
)
CREATE TABLE IF NOT EXISTS `servergraph_data` (
`id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
`serverid` INT NOT NULL,
`time` TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
`fps` SMALLINT UNSIGNED NOT NULL,
`replay` TINYINT UNSIGNED NOT NULL,
`dropped_packets` INT UNSIGNED NOT NULL,
`online` TINYINT UNSIGNED NOT NULL,
`clients0` TINYINT UNSIGNED NOT NULL,
`clients1` TINYINT UNSIGNED NOT NULL,
`clients2` TINYINT UNSIGNED NOT NULL,
`clients3` TINYINT UNSIGNED NOT NULL,
FOREIGN KEY (`serverid`) REFERENCES `servergraph_server` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
)
This are the tables I'd like to create.
But I am always getting an error on the FOREIGN KEY line.
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FOREIG' at line 1
I am using this version of MySQL: 5.5.35-0+wheezy1
What is wrong?
Thanks, floube
SOLUTION:
ALTER TABLE `servergraph_data` ADD CONSTRAINT `fk_server` FOREIGN KEY (`serverid`) REFERENCES `servergraph_server` (`id`)
instead of the FOREIGN KEY line in CREATE TABLE servergraph_data
Place semi colons after the create table statements:
CREATE TABLE IF NOT EXISTS `servergraph_server` (
`id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
`name` VARCHAR(64) NOT NULL,
`ip` VARCHAR(16) NOT NULL,
`port` SMALLINT UNSIGNED NOT NULL
);
CREATE TABLE IF NOT EXISTS `servergraph_data` (
`id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
`serverid` INT NOT NULL,
`time` TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
`fps` SMALLINT UNSIGNED NOT NULL,
`replay` TINYINT UNSIGNED NOT NULL,
`dropped_packets` INT UNSIGNED NOT NULL,
`online` TINYINT UNSIGNED NOT NULL,
`clients0` TINYINT UNSIGNED NOT NULL,
`clients1` TINYINT UNSIGNED NOT NULL,
`clients2` TINYINT UNSIGNED NOT NULL,
`clients3` TINYINT UNSIGNED NOT NULL,
FOREIGN KEY (`serverid`) REFERENCES `servergraph_server` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
);