查询sql数据结构sql语句
此查询数据结构的语句是本BLOG中的数据库帮助工具的关键...
由于 sql2000与sql2005的系统表名不同, 查询的字符串都不同,分别如下.....
sql2000
SELECT
Column_id
=
c.colid, ColumnName
=
c.name, PrimaryKey
=
CASE
WHEN
EXISTS
(
SELECT
0
FROM
sysindexkeys i
WHERE
i.id
=
c.id
and
i.colid
=
c.colid)
THEN
N
'
√
'
ELSE
N
''
END
,
[
IDENTITY
]
=
CASE
WHEN
C.colstat
=
1
THEN
N
'
IDENTITY (
'
+
RTRIM
(
IDENT_SEED
(O.name))
+
N
'
,
'
+
RTRIM
(
IDENT_INCR
(O.name))
+
N
'
)
'
ELSE
N
''
END
, Computed
=
CASE
WHEN
C.iscomputed
=
1
THEN
N
'
√
'
ELSE
N
''
END
, type
=
t.name, Length
=
c.length,
[
Precision
]
=
c.prec, Scale
=
C.scale, NullAble
=
CASE
WHEN
C.isnullable
=
1
THEN
N
'
√
'
ELSE
N
''
END
,
[
Default
]
=
ISNULL
(
CASE
WHEN
c.cdefault
>
0
THEN
(
SELECT
[
text
]
FROM
syscomments
WHERE
id
=
c.cdefault )
END
,N
''
), ColumnDesc
=
CASE
WHEN
EXISTS
(
SELECT
[
value
]
FROM
sysproperties s
WHERE
s.id
=
c.id
AND
c.colid
=
s.smallid)
THEN
(
SELECT
[
value
]
FROM
sysproperties s
WHERE
s.id
=
c.id
AND
c.colid
=
s.smallid)
ELSE
''
END
FROM
syscolumns c, sysobjects o, systypes t
WHERE
c.id
=
o.id
AND
O.name
=
{
0
}
AND
t.xtype
=
c.xtype
order
by
c.Column_id
sql2005:
SELECT
Column_id
=
C.column_id, ColumnName
=
C.name, PrimaryKey
=
ISNULL
(IDX.PrimaryKey,N
''
),
[
IDENTITY
]
=
CASE
WHEN
C.is_identity
=
1
THEN
N
'
IDENTITY (
'
+
RTRIM
(
IDENT_SEED
(O.name))
+
N
'
,
'
+
RTRIM
(
IDENT_INCR
(O.name))
+
N
'
)
'
ELSE
N
''
END
, Computed
=
CASE
WHEN
C.is_computed
=
1
THEN
N
'
√
'
ELSE
N
''
END
, Type
=
T.name, Length
=
C.max_length,
Precision
=
C.
precision
, Scale
=
C.scale, NullAble
=
CASE
WHEN
C.is_nullable
=
1
THEN
N
'
√
'
ELSE
N
''
END
,
[
Default
]
=
ISNULL
(D.definition,N
''
), ColumnDesc
=
ISNULL
(PFD.
[
value
]
,N
''
)
--
,IndexName=ISNULL(IDX.IndexName,N''),
--
IndexSort=ISNULL(IDX.Sort,N''),
--
Create_Date=O.Create_Date,
--
Modify_Date=O.Modify_date
FROM
sys.columns C
INNER
JOIN
sys.objects O
ON
C.
[
object_id
]
=
O.
[
object_id
]
AND
O.type
=
'
U
'
AND
O.is_ms_shipped
=
0
INNER
JOIN
sys.types T
ON
C.user_type_id
=
T.user_type_id
LEFT
JOIN
sys.default_constraints D
ON
C.
[
object_id
]
=
D.parent_object_id
AND
C.column_id
=
D.parent_column_id
AND
C.default_object_id
=
D.
[
object_id
]
LEFT
JOIN
sys.extended_properties PFD
ON
PFD.class
=
1
AND
C.
[
object_id
]
=
PFD.major_id
AND
C.column_id
=
PFD.minor_id
--
AND PFD.name='Caption' -- 字段说明对应的描述名称(一个字段可以添加多个不同name的描述)
LEFT
JOIN
sys.extended_properties PTB
ON
PTB.class
=
1
AND
PTB.minor_id
=
0
AND
C.
[
object_id
]
=
PTB.major_id
--
AND PFD.name='Caption' -- 表说明对应的描述名称(一个表可以添加多个不同name的描述)
LEFT
JOIN
--
索引及主键信息
(
SELECT
IDXC.
[
object_id
]
, IDXC.column_id, Sort
=
CASE
INDEXKEY_PROPERTY(IDXC.
[
object_id
]
,IDXC.index_id,IDXC.index_column_id,
'
IsDescending
'
)
WHEN
1
THEN
'
DESC
'
WHEN
0
THEN
'
ASC
'
ELSE
''
END
, PrimaryKey
=
CASE
WHEN
IDX.is_primary_key
=
1
THEN
N
'
√
'
ELSE
N
''
END
, IndexName
=
IDX.Name
FROM
sys.indexes IDX
INNER
JOIN
sys.index_columns IDXC
ON
IDX.
[
object_id
]
=
IDXC.
[
object_id
]
AND
IDX.index_id
=
IDXC.index_id
LEFT
JOIN
sys.key_constraints KC
ON
IDX.
[
object_id
]
=
KC.
[
parent_object_id
]
AND
IDX.index_id
=
KC.unique_index_id
INNER
JOIN
--
对于一个列包含多个索引的情况,只显示第1个索引信息
(
SELECT
[
object_id
]
, Column_id, index_id
=
MIN
(index_id)
FROM
sys.index_columns
GROUP
BY
[
object_id
]
, Column_id ) IDXCUQ
ON
IDXC.
[
object_id
]
=
IDXCUQ.
[
object_id
]
AND
IDXC.Column_id
=
IDXCUQ.Column_id
AND
IDXC.index_id
=
IDXCUQ.index_id ) IDX
ON
C.
[
object_id
]
=
IDX.
[
object_id
]
AND
C.column_id
=
IDX.column_id
WHERE
O.name
=
{
0
}
--
如果只查询指定表,加上此条件
ORDER
BY
O.name,C.column_id
{0} 的字符串应该替换为相应的数据库名....