Question

I’m transferring a small database from MySQL to MSSQL.

the current MySQL example declaration:
*(Keys and Not Null are intentionally skipped)

CREATE TABLE my_table(
    `id` bigint(20),
    `version` int(10),
    `user_id` tinyint(3) unsigned, /*less then 100*/
    `date_crated` int(11), /*unix time like 1334736752 */
    `image_content` blob,
    `xml_content` longtext /*xml with non english texts, 5000+ character*/
)

And my MSSQL variant:

CREATE TABLE [my_table](
    [id] bigint,
    [version] int,
    [user_id] tinyint, 
    [date_crated] int,
    [image_content] varbinary(MAX),
    [xml_content] nvarchar(MAX)
 )

I m not confident about the last three…
Is there any potential data lost this way ?

Answer 1

Looks good to me except for date_created and version: I’d go for bigint (64 bit, UNIX timestamp was widened from 32 bit to 64 bit) or timestamp — MSSQL int is 4 Byte (32 bit). You should also check if you need 64 bit integers for version too.