查sqlserver表结构说明的方法

一、查出某个库的所有表名

USE database_nameGOSELECT tab.name        AS tableNameFROM   sys.columns col       INNER JOIN sys.tables tab               ON col.object_id = tab.object_id       LEFT JOIN sys.extended_properties per              ON col.column_id = per.minor_id                 AND per.major_id = tab.object_id       INNER JOIN sys.types type               ON col.user_type_id = type.user_type_idgroup by tab.name ORDER  BY tab.name

二、查出某个库的所有字段说明

USE database_nameGOSELECT tab.name        AS tableName,       col.name        AS column_name,       per.value       AS column_comment,       col.is_identity AS column_key,       type.name       AS data_type,   col.max_length  AS column_lengthFROM   sys.columns col       INNER JOIN sys.tables tab               ON col.object_id = tab.object_id       LEFT JOIN sys.extended_properties per              ON col.column_id = per.minor_id                 AND per.major_id = tab.object_id       INNER JOIN sys.types type               ON col.user_type_id = type.user_type_idORDER  BY tab.name,          col.is_identity DESC

二、查出某个库的所有字段说明（查出数据详细格式化版）

USE database_nameGOSELECT             表名=case when a.colorder=1 then d.name else '' end,            表说明=case when a.colorder=1 then isnull(f.value,'') else '' end,            字段序号=a.colorder,            字段名=a.name,            标识=case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end,            主键=case when exists(SELECT 1 FROM sysobjects where xtype='PK' and name in (                SELECT name FROM sysindexes WHERE indid in(                    SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid                ))) then '√' else '' end,            类型=b.name,            占用字节数=a.length,            长度=COLUMNPROPERTY(a.id,a.name,'PRECISION'),            小数位数=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),            允许空=case when a.isnullable=1 then '√'else '' end,            默认值=isnull(e.text,''),            字段说明=isnull(g.[value],'')          FROM syscolumns a            left join systypes b on a.xtype=b.xusertype            inner join sysobjects d on a.id=d.id  and d.xtype='U' and  d.name<>'dtproperties'            left join syscomments e on a.cdefault=e.id         left join sys.extended_properties g on a.id=g.major_id AND a.colid = g.minor_id            left join sys.extended_properties f on d.id=f.major_id and f.minor_id=0         order by a.id,a.colorder