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 sysproperties g on a.id=g.id and a.colid=g.smallid
left join sysproperties f on d.id=f.id and f.smallid=0
--where d.name='orders' --如果只查询指定表,加上此条件
order by a.id,a.colorder
select * from syscolumns --如果是要得到纵向的表结构,可以查询系统表 可以通过上面的方法实现
以上仅对Sql 2000适用
2005里面查询表结构
--.表结构信息查询 表结构信息查询
SELECT
TableName=CASE WHEN C.column_id=1 THEN O.name ELSE N'' END,
TableDesc=ISNULL(CASE WHEN C.column_id=1 THEN PTB.[value] END,N''),
Column_id=C.column_id,
ColumnName=C.name,
PrimaryKey=ISNULL(IDX.PrimaryKey,N''),
[IDENTITY]=CASE WHEN C.is_identity=1 THEN 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=N'要查询的表' -- 如果只查询指定表,加上此条件
ORDER BY O.name,C.column_id
Oracle 9i获得表结构
select * from
(
select
all_tab_columns.column_name,
data_type,
To_Char(data_length) as data_length,
nullable,
all_col_comments.comments
from
all_tab_columns,
all_tables,
all_col_comments
where
all_tables.table_name = upper('BLC_CHARGEUPIN_HEAD') and
all_tab_columns.table_name = all_tables.table_name and
all_col_comments.table_name(+) = upper('BLC_CHARGEUPIN_HEAD') and
all_tables.OWNER like upper('CMMP') and
all_tab_columns.OWNER = all_tables.OWNER and
all_col_comments.column_name(+) = all_tab_columns.column_name
and all_col_comments.column_name not in ('CREATED_BY','CREATED_DATE','LAST_UPDATED_BY','LAST_UPDATED_DATE','VERSION_NO','TRANSACTION_ID')
and data_type<>'NUMBER'
and all_col_comments.owner =upper('CMMP')
union
select
all_tab_columns.column_name,
data_type,
data_precision|| ',' ||data_scale as data_length,
nullable,
all_col_comments.comments
from
all_tab_columns,
all_tables,
all_col_comments
where
all_tables.table_name = upper('BLC_CHARGEUPIN_HEAD') and
all_tab_columns.table_name = all_tables.table_name and
all_col_comments.table_name(+) = upper('BLC_CHARGEUPIN_HEAD') and
all_tables.OWNER like upper('CMMP') and
all_tab_columns.OWNER = all_tables.OWNER and
all_col_comments.column_name(+) = all_tab_columns.column_name
and all_col_comments.column_name not in ('CREATED_BY','CREATED_DATE','LAST_UPDATED_BY','LAST_UPDATED_DATE','VERSION_NO','TRANSACTION_ID')
and data_type='NUMBER'
and all_col_comments.owner =upper('CMMP')
)
where column_name='AGENT_NAME'
其中BLC_CHARGEUPIN_HEAD 是表名,CMMP 是用户名,AGENT_NAME 是列名
