1. 查詢一個表的所有列名

------查詢一個表的所有列名

Select Name FROM SysColumns Where id=Object_Id(‘Sys_User‘)

select t.column_name from information_schema.columns t where t.table_name=‘Sys_User‘;

如圖所示:

2. 查詢一個表的所有字段的註釋

------查詢一個表的所有字段的註釋
select value from sys.extended_properties where major_id = object_id (‘Sys_User‘ );

如圖所示：

3. 查詢一個表的所有列名，字段的註釋

------查詢一個表的所有列名，字段的註釋

SELECT
A.name AS table_name,
B.name AS column_name,
C.value AS column_description
FROM sys.tables A
INNER JOIN sys.columns B ON B.object_id = A.object_id
LEFT JOIN sys.extended_properties C ON C.major_id = B.object_id AND C.minor_id = B.column_id
WHERE A.name 
 
= ‘Sys_User‘

4. 查詢一個表的所有列名，數據類型

------查詢一個表的所有列名，數據類型

select column_name,data_type from information_schema.columns 
where table_name = ‘Sys_User‘

如圖所示：

5. 查詢一個表的所有信息

------查詢一個表的所有信息

select * FROM information_schema.columns 
where table_name = ‘Sys_User‘

6. sqlserver 查詢某個表的列名稱、說明、備註、類型等

------sqlserver 查詢某個表的列名稱、說明、備註、類型等

SELECT 
    表名       = case when a.colorder=1 then d.name else ‘‘ end,
    表說明     = case when a.colorder=1 then isnull(f.value,‘‘) else ‘‘ end,
    字段序號   = a.colorder,
    字段名     = a.name,
    標識       = case when COLUMNPROPERTY( a.id,a.name,‘IsIdentity‘)=1 then ‘√‘else ‘‘ end,
    主鍵       = case when exists(SELECT 1 FROM sysobjects where xtype=‘PK‘ and parent_obj=a.id 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,
    類型       = b.name,
    占用字節數 = a.length,
    長度       = COLUMNPROPERTY(a.id,a.name,‘PRECISION‘),
    小數位數   = isnull(COLUMNPROPERTY(a.id,a.name,‘Scale‘),0),
    允許空     = case when a.isnullable=1 then ‘√‘else ‘‘ end,
    默認值     = isnull(e.text,‘‘),
    字段說明   = 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=‘Sys_User‘    --如果只查詢指定表,加上此where條件，tablename是要查詢的表名；去除where條件查詢所有的表信息
order by 
    a.id,a.colorder

Sql Server 數據庫擴展