SQL 查看所有表名:
select name from sysobjects where type='U'
查询表的所有字段名:
Select name from syscolumns Where ID=OBJECT_ID('表名')
select * from information_schema.tables
select * from information_schema.views
select * from information_schema.columns
ACCESS
查看所有表名:
select name from MSysObjects where type=1 and flags=0
MSysObjects是系统对象,默认情况是隐藏的。通过工具、选项、视图、显示、系统对象可以使之显示出来。
SQL查询表的备注说明
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
FROM syscolumns a
inner join sysobjects d
on a.id = d.id
and d.xtype = 'U'
and d.name <> 'sys.extended_properties'
left join sys.extended_properties f
on a.id = f.major_id
and f.minor_id = 0
SQL查询表的所有字段的备注说明
SQL_1:
SELECT Sysobjects.name AS TABLE_NAME, syscolumns.Id, syscolumns.name AS COLUMN_NAME,
systypes.name AS DATA_TYPE, syscolumns.length as CHARACTER_MAXIMUM_LENGTH,
sys.extended_properties.[value] AS COLUMN_DESCRIPTION, syscomments.text as
COLUMN_DEFAULT,syscolumns.isnullable as IS_NULLABLE FROM syscolumns
INNER JOIN systypes
ON syscolumns.xtype = systypes.xtype
LEFT JOIN sysobjects ON syscolumns.id = sysobjects.id
LEFT OUTER JOIN sys.extended_properties ON
( sys.extended_properties.minor_id = syscolumns.colid
AND sys.extended_properties.major_id = syscolumns.id)
LEFT OUTER JOIN syscomments ON syscolumns.cdefault = syscomments.id
WHERE syscolumns.id IN
(SELECT id FROM SYSOBJECTS WHERE xtype = 'U') AND (systypes.name <> 'sysname')
ORDER BY syscolumns.colid
SQL_2:
SELECT
(case when a.colorder=1 then d.name else '' end) N'表名',
a.colorder N'字段序号',
a.name N'字段名',
(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else ''
end) N'标识',
(case when (SELECT count(*)
FROM sysobjects
WHERE (name in
(SELECT name
FROM sysindexes
WHERE (id = a.id) AND (indid in
(SELECT indid
FROM sysindexkeys
WHERE (id = a.id) AND (colid in
(SELECT colid
FROM syscolumns
WHERE (id = a.id) AND (name = a.name))))))) AND
(xtype = 'PK'))>0 then '√' else '' end) N'主键',
b.name N'类型',
a.length N'占用字节数',
COLUMNPROPERTY(a.id,a.name,'PRECISION') as N'长度',
isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as N'小数位数',
(case when a.isnullable=1 then '√'else '' end) N'允许空',
isnull(e.text,'') N'默认值',
isnull(g.[value],'') AS N'字段说明'
FROM syscolumns a
left join systypes b
on a.xtype=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
order by object_name(a.id),a.colorder