How do I INSERT into a database with a primary autoincrement key? - mysql

Question

So I have a table that is laid out according to:
CREATE TABLE `dealerships` (
`dealership_id` BIGINT(20) UNSIGNED NOT NULL,
`zone` CHAR(200) NULL DEFAULT NULL,
`phone` BIGINT(20) UNSIGNED NOT NULL,
`fax` BIGINT(20) UNSIGNED NOT NULL,
`name` CHAR(200) NULL DEFAULT NULL,
`address1` CHAR(200) NULL DEFAULT NULL,
`address2` CHAR(200) NULL DEFAULT NULL',
`servicephone` BIGINT(20) UNSIGNED NULL DEFAULT NULL,
`timezone` CHAR(20) NULL DEFAULT NULL,
PRIMARY KEY (`dealership_id`)
)
COMMENT='This stores dealership information. '
COLLATE='utf8_general_ci'
ENGINE=InnoDB;
Now when I insert with
INSERT INTO dealerships (dealership_id, ~the rest~), VALUES( NULL, ~values);
This returns an error that dealership_id cannot be NULL error 1048.
INSERT INTO dealerships (dealership_id, ~the rest~), VALUES(0, ~values);
This returns an error that dealership_id already exists for value 0.
INSERT INTO dealerships (dealership_id, ~the rest~), VALUES(default, ~values);
This returns an error that dealership_id has no default value error 1364.
When I simply say screw it, and ommit dealership_id
INSERT INTO dealerships (~the rest~), VALUES(~values);
I get the error that a value must be specified for dealership_id.
Every-time I've worked with autoincrement primary keys. Normally inserting NULL would work for the index to do the auto-magical things for me. What is happening??
Platform Specific Information:
MariaDB10.1.18 x64
Windows Server 2012 R2

Answer 1

For create add AUTO_INCREMENT
CREATE TABLE `dealerships` (
`dealership_id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
`zone` CHAR(200) NULL DEFAULT NULL,
`phone` BIGINT(20) UNSIGNED NOT NULL,
`fax` BIGINT(20) UNSIGNED NOT NULL,
`name` CHAR(200) NULL DEFAULT NULL,
`address1` CHAR(200) NULL DEFAULT NULL,
`address2` CHAR(200) NULL DEFAULT NULL',
`servicephone` BIGINT(20) UNSIGNED NULL DEFAULT NULL,
`timezone` CHAR(20) NULL DEFAULT NULL,
PRIMARY KEY (`dealership_id`)
)
COMMENT='This stores dealership information. '
COLLATE='utf8_general_ci'
ENGINE=InnoDB;
and for insert don't insert the key (is automatically create by auto increment)
insert into `dealerships` (
`zone`,
`phone`,
`fax` ,
`name`,
`address1`,
`address2`',
`servicephone` ,
`timezone`
) values (
'vale_zone',
1,
2 ,
'val_name',
'val_address1',
'val_address2',
3 ,
'val_timezone'
)

Answer 2

To insert a field with auto increment property, use ID int NOT NULL AUTO_INCREMENT in the create table.
CREATE TABLE `dealerships` (
`dealership_id` INT NOT NULL AUTO_INCREMENT,
`zone` CHAR(200) NULL DEFAULT NULL,
`phone` BIGINT(20) UNSIGNED NOT NULL,
`fax` BIGINT(20) UNSIGNED NOT NULL,
`name` CHAR(200) NULL DEFAULT NULL,
`address1` CHAR(200) NULL DEFAULT NULL,
`address2` CHAR(200) NULL DEFAULT NULL',
`servicephone` BIGINT(20) UNSIGNED NULL DEFAULT NULL,
`timezone` CHAR(20) NULL DEFAULT NULL,
PRIMARY KEY (`dealership_id`)
)
COMMENT='This stores dealership information. '
COLLATE='utf8_general_ci'
ENGINE=InnoDB;
After, you have two solutions to insert data.
Solution 1
INSERT INTO dealerships(zone, phone, fax, name) VALUES('zone1', '00000', '00000', 'name1')
In this case I chossen to add data in only few columns (add the others on the wame way).
Solution 2
INSERT INTO dealerships SET zone = 'zone1', phone = '0000', name = 'Eddy'
Here, I used the field SET field = value, field2 = value2.
As you can see I didn't added any reference to the ID. Normal, the field is AUTO_INCREMENT mode, and Mysql (or tothers SGBD) will create automatically a value.
Of course, you can force the value:
INSERT INTO dealerships SET dealership_id = 10, zone = 'zone1', phone = '0000', name = 'Eddy'
INSERT INTO dealerships(dealership_id, zone, phone, fax, name) VALUES(9, 'zone1', '00000', '00000', 'name1')
http://www.w3schools.com/sql/sql_insert.asp
About your errors
Normal. You specified NOT NULL
Normal, there is already a record for the value 0 (check your database)
Normal. You can't use default. This is a constant with his own value (1364).
Normal, the field as if can't be ommited
The only way to does not have this issue is to remove completely the reference of the ID field. Use the solution described :)

Answer 3

Georges explained it all for you. If you want to add auto increment to table just run this sql statement
ALTER TABLE dealerships MODIFY COLUMN dealership_id BIGINT(20) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT;
This will add the auto increment property on the column dealership_id. And if you want to change auto increment start value run this (Change 100 to your start value)
ALTER TABLE dealerships AUTO_INCREMENT=100;