1.获取所有数据库名:
SELECT Name FROM Master..SysDatabases ORDER BY Name
2.获取所有表名:
SELECT Name FROM DatabaseName..SysObjects Where XType='U' ORDER BY Name
XType='U':表示所有用户表;
XType='S':表示所有系统表;
3.获取所有字段名:
SELECT Name FROM SysColumns WHERE id=Object_Id('TableName')
SELECT Name FROM Master..SysDatabases ORDER BY Name
2.获取所有表名:
SELECT Name FROM DatabaseName..SysObjects Where XType='U' ORDER BY Name
XType='U':表示所有用户表;
XType='S':表示所有系统表;
3.获取所有字段名:
SELECT Name FROM SysColumns WHERE id=Object_Id('TableName')
获取一个表的字段，类型，长度，是否主键，是否为空，注释等信息
SELECT
[表名]=case when a.colorder=1then d.name else '' end,
[表说明]=case when a.colorder=1then 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')=1then '√'else '' end,
[主键]=case when exists(SELECT 1FROM 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 'true' 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=1then '√'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='city' --如果只查询指定表,加上此条件
order by a.id,a.colorder
[表名]=case when a.colorder=1then d.name else '' end,
[表说明]=case when a.colorder=1then 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')=1then '√'else '' end,
[主键]=case when exists(SELECT 1FROM 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 'true' 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=1then '√'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='city' --如果只查询指定表,加上此条件
order by a.id,a.colorder
OR
select
c.
name
as
cname,c.prec
AS
Prec,c.isnullable
AS
isnullable,
[IsPk]=
case
when
exists(
SELECT
1
FROM
sysobjects
where
xtype=
'PK'
and
parent_obj=c.id
and
name
in
(
SELECT
name
FROM
sysindexes
WHERE
indid
in
(
SELECT
indid
FROM
sysindexkeys
WHERE
id = c.id
AND
colid=c.colid)))
then
'1'
else
'0'
end
,
[defaultval]=
isnull
(e.text,
''
),
t.
name
as
tname ,(
select
value
from
sys.extended_properties
as
ex
where
ex.major_id = c.id
and
ex.minor_id = c.colid)
as
notes
from
syscolumns
as
c
inner
join
sys.tables
as
ta
on
c.id=ta.object_id
inner
join
(
select
name
,system_type_id
from
sys.types
where
name
<>
'sysname'
)
as
t
on
c.xtype=t.system_type_id
left
join
syscomments e
on
c.cdefault=e.id
where
ta.
name
=
'TestTb'
order
by
c.colid
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