查询指定表全部字段信息，包含主键，计算列表达式等

SELECT a.column_id,a.name,b.name AS datatye,a.max_length,a.precision,a.scale,a.is_identity,a.is_nullable,a.is_computed,g.definition AS defaultValue,c.definition AS expression,d.value AS comment,e.indid AS indexId,f.name AS indexName,f.is_primary_key,f.is_uniquefrom sys.columns aLEFT JOIN sys.types b ON a.system_type_id=b.system_type_idLEFT JOIN sys.computed_columns c ON a.column_id=c.column_idLEFT JOIN sys.extended_properties d ON d.major_id=a.object_id AND minor_id=a.column_id  LEFT JOIN sysindexkeys e ON a.object_id=e.id AND a.column_id=e.colidLEFT JOIN sys.indexes f ON f.object_id=a.object_id AND f.index_id=e.indid AND e.colid=a.column_idLEFT JOIN sys.default_constraints g ON g.object_id=a.default_object_id WHERE a.object_id= OBJECT_ID('test') 

SQL 2008以上版本，以下的不知道支不支持

可以查询字段的数据类型，长度，精度，自增列，是否为空，计算列及表达式，默认值，字段说明等信息