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,     字段说明   = isnull(G.[value],''),     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 parent_obj=A.id 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,'') 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 sys.extended_properties  G on     A.id=G.major_id and A.colid=G.minor_id Left Join sys.extended_properties F On     D.id=F.major_id and F.minor_id=0     --where d.name='OrderInfo'    --如果只查询指定表,加上此条件 Order By     A.id,A.colorder

执行这个查询语句就可以完全取出所有表的数据结构，这样在写表结构的时候就很方便了。