Use SQL statements to export database table structure definitions, which facilitates the generation of database definition documents

During development projects, you often need to record the table structure of the database as a document to facilitate future maintenance. You can use the following SQL statement to get the table structure definition, which is convenient for copying to the document:

 

Select -- T. object_id,
T. Name as tablename
, C. Name as columnname
, Case when Ty. Name = 'varchar 'then
Case when C. max_length =-1
Then Ty. Name + '(max )'
Else Ty. Name + '(' + convert (varchar, C. max_length) + ')'
End
When Ty. Name = 'nvarchar 'then
Case when C. max_length =-1
Then Ty. Name + '(max )'
Else Ty. Name + '(' + convert (varchar, C. max_length/2) + ')'
End
When Ty. Name = 'numeric 'then
Ty. Name + '(' + convert (varchar, C. Precision) + ',' + convert (varchar, C. Scale) + ')'
Else Ty. Name
End as typename
, Case when C. is_identity = 1
Then 'yes'
Else 'no'
End as is_identity
, Case when C. is_nullable = 1
Then 'yes'
Else 'no'
End as is_nullable
, C. max_length
, C. Precision
, (Select Value
From SYS. extended_properties as ex
Where ex. major_id = C. object_id
And Ex. major_id = C. column_id) as notes
, Scale
From SYS. Tables as t
Left join SYS. columns as C
On C. object_id = T. object_id
Inner join
(Select name
, System_type_id
From SYS. Types
Where name <> 'sysname') as ty
On C. system_type_id = Ty. system_type_id
-- Where T. name like 'vs _ %' -- filter table name
Order by T. Name, C. column_id

 

 

Result After executing the preceding statement