253.表结构新

Love The Way You Lie 2023-12-27 06:19 81阅读 0赞

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 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,''),
    	字段说明=isnull(g.[value],''),
    	索引名称=isnull(h.索引名称,''),
    	索引顺序=isnull(h.排序,'')
    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.status>=0
    	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
    	left join(--这部分是索引信息,如果要显示索引与表及字段的对应关系,可以只要此部分
    		select 索引名称=a.name,c.id,d.colid
    			,排序=case indexkey_property(c.id,b.indid,b.keyno,'isdescending')
    				when 1 then '降序' when 0 then '升序' end
    		from sysindexes a
    			join sysindexkeys b on a.id=b.id and a.indid=b.indid
    			join (--这里的作用是有多个索引时,取索引号最小的那个
    				select id,colid,indid=min(indid) from sysindexkeys
    				group by id,colid) b1 on b.id=b1.id and b.colid=b1.colid and b.indid=b1.indid
    			join sysobjects c on b.id=c.id and c.xtype='U' and c.status>=0
    			join syscolumns d on b.id=d.id and b.colid=d.colid
    		where a.indid not in(0,255)
    	) h on a.id=h.id and a.colid=h.colid
    --where d.name='要查询的表'    --如果只查询指定表,加上此条件
    order by a.id,a.colorder
    
    
    
    
    
    --索引信息
    
    --索引信息
    select 索引名称=case when b.keyno=1 then a.name else '' end
    	,表名=case when b.keyno=1 then c.name else '' end
    	,列名=d.name
    	,排序=case indexkey_property(c.id,b.indid,b.keyno,'isdescending')
    		when 1 then '降序' when 0 then '升序' end
    	,聚集=INDEXPROPERTY(c.id,a.name,'IsClustered')
    	,唯一=case INDEXPROPERTY(c.id,a.name,'IsUnique')
    		when 0 then '非唯一'
    		when 1 then case when e.id is null then '唯一索引' else '唯一约束' end
    		end
    	,e.name
    	,填充因子=a.OrigFillFactor
    from sysindexes a
    	join sysindexkeys b on a.id=b.id and a.indid=b.indid
    --	join (--这里的作用是有多个索引时,取索引号最小的那个
    --		select id,colid,indid=min(indid) from sysindexkeys
    --		group by id,colid) b1 on b.id=b1.id and b.colid=b1.colid and b.indid=b1.indid
    	join sysobjects c on b.id=c.id and c.xtype='U' and c.status>=0
    	join syscolumns d on b.id=d.id and b.colid=d.colid
    	left join sysobjects e on b.indid=e.id and e.xtype='UQ'
    where a.indid not in(0,255)
    order by c.name,a.name