1.获取数据库中的表
select name from sysobjects where type='U'
2.获取表字段（此处是Route表）
Select name from syscolumns Where ID=OBJECT_ID('Route')
3.获取表中字段的描述
SELECT value FROM ::fn_listextendedproperty (NULL, 'user', 'dbo', 'table', 'Route', 'column', default)
4.获取表的信息的所有信息如下图
select b.[value] from sys.columns a left join sys.extended_properties b on a.object_id=b.major_id
and a.column_id=b.minor_id inner join sysobjects c on a.column_id=c.id
and a.[name]='列名' and c.[name]='表名'
SELECT
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.xusertype=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
--where d.name='orders' --如果只查询指定表,加上此条件
order by a.id,a.colorder
如下图
5.获取一个表的表名，字段名，数据类型，字段说明的简写SQL：
SELECT
--表名
[TableName] = i_s.TABLE_NAME,
--列名
[ColumnName] = i_s.COLUMN_NAME,
--字段描述
[Description] = s.value,
--数据类型
[DataType]=i_s.DATA_TYPE ,
--是否是主键
[IsPrimaryKey]=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
FROM
INFORMATION_SCHEMA.COLUMNS i_s
LEFT OUTER JOIN sys.extended_properties s ON
s.major_id = OBJECT_ID(i_s.TABLE_SCHEMA+'.'+i_s.TABLE_NAME)
AND s.minor_id = i_s.ORDINAL_POSITION
AND s.name = 'MS_Description'
INNER JOIN syscolumns a ON a.id=s.major_id AND a.colid=s.minor_id WHERE OBJECTPROPERTY(OBJECT_ID(i_s.TABLE_SCHEMA+'.'+i_s.TABLE_NAME), 'IsMsShipped')=0
AND i_s.TABLE_NAME = 'BusRoute' AND i_s.TABLE_SCHEMA='office'
ORDER BY i_s.TABLE_NAME, i_s.ORDINAL_POSITION