/**//* 谁可以帮我写个SQL执行后返回的列分别是:表名、列名、列类型、列长度、列描述、是否主键 写完整来。就是我一拿过来就可以运行的那种!~!~谢谢哦。 */ SELECT (casewhen a.colorder=1then d.name else''end) N'表名', a.colorder N'字段序号', a.name N'字段名', (casewhenCOLUMNPROPERTY( a.id,a.name,'IsIdentity')=1then'√'else''end) N'标识', (casewhen (SELECTcount(*) 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'))>0then'√'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', (casewhen a.isnullable=1then'√'else''end) N'允许空', isnull(e.text,'') N'默认值', isnull(g.[value],'') AS N'字段说明' --into ##tx FROM syscolumns a leftjoin systypes b on a.xtype=b.xusertype innerjoin sysobjects d on a.id=d.id and d.xtype='U'and d.name<>'dtproperties' leftjoin syscomments e on a.cdefault=e.id leftjoin sysproperties g on a.id=g.id AND a.colid = g.smallid orderbyobject_name(a.id),a.colorder --方法二 SET ANSI_NULLS OFF GO SET NOCOUNT ON GO SET LANGUAGE 'Simplified Chinese' go DECLARE@tblnvarchar(200),@fldnvarchar(200),@sqlnvarchar(4000),@maxlenint,@samplenvarchar(40) SELECT d.name TableName,a.name FieldName,b.name TypeName,a.length Length,a.isnullable IS_NULL INTO #t FROM syscolumns a, systypes b,sysobjects d WHERE a.xtype=b.xusertype and a.id=d.id and d.xtype='U' DECLARE read_cursor CURSOR FORSELECT TableName,FieldName FROM #t SELECTTOP1'_TableName ' TableName, 'FieldName ' FieldName,'TypeName ' TypeName, 'Length' Length,'IS_NULL' IS_NULL, 'MaxLenUsed'AS MaxLenUsed,'Sample Value ' Sample, 'Comment ' Comment INTO #tc FROM #t OPEN read_cursor FETCHNEXTFROM read_cursor INTO@tbl,@fld WHILE (@@fetch_status<>-1) --- failes BEGIN IF (@@fetch_status<>-2) -- Missing BEGIN SET@sql=N'SET @maxlen=(SELECT max(len(cast('+@fld+' as nvarchar))) FROM '+@tbl+')' --PRINT @sql EXEC SP_EXECUTESQL @sql,N'@maxlen int OUTPUT',@maxlen OUTPUT --print @maxlen SET@sql=N'SET @sample=(SELECT TOP 1 cast('+@fld+' as nvarchar) FROM '+@tbl+' WHERE len(cast('+@fld+' as nvarchar))='+convert(nvarchar(5),@maxlen)+')' EXEC SP_EXECUTESQL @sql,N'@sample varchar(30) OUTPUT',@sample OUTPUT --for quickly --SET @sql=N'SET @sample=convert(varchar(20),(SELECT TOP 1 '+@fld+' FROM '+ --@tbl+' order by 1 desc ))' PRINT@sql print@sample print@tbl EXEC SP_EXECUTESQL @sql,N'@sample nvarchar(30) OUTPUT',@sample OUTPUT INSERTINTO #tc SELECT*,ltrim(ISNULL(@maxlen,0)) as MaxLenUsed, convert(nchar(20),ltrim(ISNULL(@sample,''))) as Sample,'' Comment FROM #t where TableName=@tbland FieldName=@fld END FETCHNEXTFROM read_cursor INTO@tbl,@fld END CLOSE read_cursor DEALLOCATE read_cursor GO SET ANSI_NULLS ON GO SET NOCOUNT OFF GO selectcount(*) from #t DROPTABLE #t GO selectcount(*)-1from #tc select*into ##tx from #tc orderby tablename select*from ##tx