在使用sql server進行表管理時，可以通過sql語句來獲取 表相關的結構
主要用到的是
sys.sysobjects資料庫物件表。包括 表名物件 、表的約束等，都存在這張表上
sys.syscolumns 資料庫所有物理表的列儲存所有表的列
sys.syscomments 預設值資訊表主要儲存了表的列的預設值
sys.extended_properties擴充套件屬性列的相關擴充套件屬性，像 列字段的說明等
select
tb.[name] as tableid, tc.[name] as fieldname, convert(int,tc.[colorder]) as sortindex,
(case when tk.table_name is not null then 'y' else 'n' end) as iskey,
(case when tk.table_name is not null then (case when columnproperty( tc.id,tc.name,'isidentity')=1 then 'identity' else 'customer' end) else null end) as keyrule,
t0.name fieldtype,
(case when tc.length > 0 and t0.name in ('nvhar','nvarchar') then tc.length / 2
when t0.name='ntext' then '2147483646'
else tc.length end) length,
(case tc.[isnullable] when 0 then 'y' else 'n' end) as notnull,
substring(tm.text,4 , len(tm.text)-5) as defaultvalue,
te.value as fielddesc
from sys.sysobjects tb --ob 所以取b 表示物件
left join sys.syscolumns tc on tb.id = tc.id --column 列 就取 tc替代
left join sys.systypes t0 on tc.xtype = t0.xusertype
left join information_schema.key_column_usage tk on tb.[name]= tk.table_name and tk.column_name = tc.[name]
left join sys.syscomments tm on tc.cdefault=tm.id
left join sys.extended_properties te on tc.id=te.major_id and tc.colid=te.minor_id
where tb.[name] = '表名'
order by
tc.id,tc.colorder
網上扒來的 包含是否為索引 的 sql查詢
select
a.colorder as colorder,
d.name as tablename,
a.name as fieldname,
convert(int,case when columnproperty( a.id,a.name,'isidentity')=1 then 1 else 0 end) as isindex,
convert(int,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 1 else 0 end) as ispk,
b.name as sqltypename,
a.length as 'length',
convert(int,columnproperty(a.id,a.name,'precision')) as 'size',
convert(int,isnull(columnproperty(a.id,a.name,'scale'),0)) as 'scale',
convert(int,case when a.isnullable=1 then 1 else 0 end) as 'nullable',
convert(varchar(100), isnull(e.text,'')) as defaultval,
convert(varchar(255), isnull(g.[value],'')) as remarks
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='表名'
order by
a.id,a.colorder
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