--获取SqlServer中表结构 主键，及描述
declare @table_name as varchar(max)
set @table_name = 'dbTypes'
select sys.columns.name, sys.types.name, sys.columns.max_length, sys.columns.is_nullable,
(select count(*) from sys.identity_columns where sys.identity_columns.object_id = sys.columns.object_id and sys.columns.column_id = sys.identity_columns.column_id) as is_identity ,
(select count(*) from (SELECT TABLE_NAME,COLUMN_NAME FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE TABLE_NAME=@table_name)t where t.COLUMN_NAME=sys.columns.name) as is_pk,
(select value from sys.extended_properties where sys.extended_properties.major_id = sys.columns.object_id and sys.extended_properties.minor_id = sys.columns.column_id) as description
from sys.columns, sys.tables, sys.types where sys.columns.object_id = sys.tables.object_id and sys.columns.system_type_id=sys.types.system_type_id and sys.tables.name=@table_name order by sys.columns.column_id