查询数据库表和字段sql语句

今天整理资料时看到有这样一个查询数据库中的表和字段信息的语句，很强! 就是忘了当初谁写的了，印像中该是邹建所创。也贴出来以后备用吧。

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SELECT
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表名   = CASE a.colorder WHEN 1 THEN c.name ELSE '' END,
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序     = a.colorder,
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字段名 = a.name,
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标识   = CASE COLUMNPROPERTY(a.id,a.name,'IsIdentity') WHEN 1 THEN '√' ELSE '' END,
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主键   = CASE
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WHEN EXISTS (
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SELECT *
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FROM sysobjects
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WHERE xtype='PK' AND name IN (
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SELECT name
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FROM sysindexes
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WHERE id=a.id AND indid IN (
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SELECT indid
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FROM sysindexkeys
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WHERE id=a.id AND colid IN (
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SELECT colid
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FROM syscolumns
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WHERE id=a.id AND name=a.name
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)
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)
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)
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)
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THEN '√'
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ELSE ''
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END,
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类型   = b.name,
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字节数 = a.length,
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长度   = COLUMNPROPERTY(a.id,a.name,'Precision'),
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小数   = CASE ISNULL(COLUMNPROPERTY(a.id,a.name,'Scale'),0)
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WHEN 0 THEN ''
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ELSE CAST(COLUMNPROPERTY(a.id,a.name,'Scale') AS VARCHAR)
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END,
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允许空 = CASE a.isnullable WHEN 1 THEN '√' ELSE '' END,
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默认值 = ISNULL(d.[text],''),
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说明   = ISNULL(e.[value],'')
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FROM syscolumns a
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LEFT  JOIN systypes      b ON a.xtype=b.xusertype
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INNER JOIN sysobjects    c ON a.id=c.id AND c.xtype='U' AND c.name<>'dtproperties'
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LEFT  JOIN syscomments   d ON a.cdefault=d.id
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LEFT  JOIN sysproperties e ON a.id=e.id AND a.colid=e.smallid
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ORDER BY c.name, a.colorder

我修改一下，变个精简版本的：

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select a.name, b.xtype,b.name
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from syscolumns a
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inner JOIN systypes b
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ON a.xtype=b.xusertype
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inner join sysobjects c ON
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a.id=c.id AND c.xtype='U' AND c.name<>'dtproperties' where c.name = 表名