CREATE TABLE in MySQL syntax error

Question

i am trying to use the db to link it with my java project and i am using wampsarver to create the db. what should i do to fix this please .

1064 - You ha

Answer 1

DOUBLE requires precision too ( I gave DOUBLE(20,2) - change it as needed).

Plus there was a stray space at the end of serial number column name.

CREATE TABLE `Laptop` (
`serial number` INT( 20 ) NOT NULL ,
`Device Model` VARCHAR( 20 ) NOT NULL ,
`Device Manufacturer` VARCHAR( 20 ) NOT NULL ,
`Device Color` VARCHAR( 20 ) NOT NULL ,
`Screen size` DOUBLE( 20,2) NOT NULL ,
`Phone` DOUBLE( 20 ,2) NOT NULL ,
`Id` INT( 20 ) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
UNIQUE (
`serial number` 
)
) 

Also, it's better to use DECIMAL instead of DOUBLE as the doubles can't be represented exactly and creates problem while doing comparisons.

Answer 2

For double you have to add another digit after comma for precision.Also No space is allowed after name.the following script is working

 CREATE TABLE `Laptop` (
 `serial number` INT( 20 ) NOT NULL ,
 `Device Model` VARCHAR( 20 ) NOT NULL ,
 `Device Manufacturer` VARCHAR( 20 ) NOT NULL ,
 `Device Color` VARCHAR( 20 ) NOT NULL ,
 `Screen size` DOUBLE( 20,4 ) NOT NULL ,
 `Phone` DOUBLE( 20,4 ) NOT NULL ,
 `Id` INT( 20 ) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
  UNIQUE (
 `serial number` 
  )
  ) ENGINE = innodb