I have a number of tables I need to convert from mySQL to SQL Server.
An Example of a mySQL Table is
CREATE TABLE `required_items` (
`id` INT( 11 ) NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT 'Unique Barcode ID',
`fk_load_id` INT( 11 ) NOT NULL COMMENT 'Load ID',
`barcode` VARCHAR( 255 ) NOT NULL COMMENT 'Barcode Value',
`description` VARCHAR( 255 ) NULL DEFAULT NULL COMMENT 'Barcode Description',
`created` TIMESTAMP NULL DEFAULT NULL COMMENT 'Creation Timestamp',
`modified` TIMESTAMP ON UPDATE CURRENT_TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT 'Modified Timestamp',
FOREIGN KEY (`fk_load_id`) REFERENCES `loads`(`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE = InnoDB CHARACTER SET ascii COLLATE ascii_general_ci COMMENT = 'Contains Required Items for the Load';
And a trigger to update the created date
CREATE TRIGGER required_items_before_insert_created_date BEFORE INSERT ON `required_items`
FOR EACH ROW
BEGIN
SET NEW.created = CURRENT_TIMESTAMP;
END
Now I need to create tables similar to this in SQL Server. There seems to be a lot of different data types available so I am unsure which to use.
- What data type should I use to the primary key column (uniqueidentifier, bigint, int)?
- What should I use for the timestamps (timestamp, datatime, datetime2(7))?
- How should I enforce the created and modified timestamps (currently I am using triggers)?
- How can I enforce foreign key constraints.
- Should I be using Varchar(255) in SQL Server? (Maybe Text, Varchar(MAX) is better)
I am using Visual Studio 2010 to create the tables.