252.表结构简

梦里梦外; 2023-12-27 06:18 51阅读 0赞

SELECT --TableName=o.name,OWNER=USER_NAME(o.uid),TableDescription=ISNULL(ptb.value,N''),
    	TableName=CASE WHEN c.colid=1 THEN o.name ELSE N'' END,
    	OWNER=CASE WHEN c.colid=1 THEN USER_NAME(o.uid) ELSE N'' END,
    	TableDescription=CASE WHEN c.colid=1 THEN ISNULL(ptb.value,N'') ELSE N'' END,
    	FieldId=c.colid,FieldName=c.name,
    	FieldType=QUOTENAME(t.name)
    		+CASE 
    			WHEN t.name IN (N'decimal',N'numeric')
    			THEN N'('+CAST(c.prec as varchar)+N','+CAST(c.scale as varchar)+N')'
    			WHEN t.name IN (N'float')
    				OR t.name like N'%char'
    				OR t.name like N'%binary'
    			THEN N'('+CAST(c.prec as varchar)+N')'
    			ELSE N'' END
    		+CASE WHEN c.isnullable=1 THEN N'' ELSE N' NOT' END+N' NULL',
    	FieldDescription=ISNULL(pfd.value,''),
    	DefileLength=c.length,
    	FieldDefault=ISNULL(df.text,N''),
    	IsIDENTITY=CASE WHEN COLUMNPROPERTY(o.id,c.name,N'IsIdentity')=1 THEN N'√' ELSE N'' END,
    	IsComputed=CASE WHEN COLUMNPROPERTY(o.id,c.name,N'IsComputed')=1 THEN N'√' ELSE N'' END,
    	IsROWGUID=CASE WHEN COLUMNPROPERTY(o.id,c.name,N'IsRowGuidCol')=1 THEN N'√' ELSE N'' END,
    	IsPrimaryKey=CASE WHEN opk.xtype IS NULL THEN N'' ELSE N'√' END
    FROM sysobjects o
    	JOIN syscolumns c
    		ON c.id=o.id
    			AND OBJECTPROPERTY(o.id,N'IsUserTable')=1
    --			AND o.name=N'要查询的表名'
    --			AND c.name=N'要查询的列名'
    	JOIN systypes t
    		ON t.xusertype=c.xusertype
    	LEFT JOIN syscomments df
    		ON df.id=c.cdefault
    	LEFT JOIN sysproperties ptb
    		ON ptb.id=o.id and ptb.smallid=0
    	LEFT JOIN sysproperties pfd
    		ON pfd.id=o.id and pfd.smallid=c.colid
    	LEFT JOIN sysindexkeys idxk
    		ON idxk.id=o.id
    			AND idxk.colid=c.colid
    	LEFT JOIN sysindexes idx
    		ON idx.indid=idxk.indid
    			AND idx.id=idxk.id
    			AND idx.indid NOT IN(0,255)
    	LEFT JOIN sysobjects opk
    		ON opk.parent_obj=o.id
    			AND opk.name=idx.name
    			AND OBJECTPROPERTY(opk.id,N'IsPrimaryKey')=1
    ORDER BY o.name,c.colid
    
    
    
    
    
    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],'')
    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 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
    --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
    
    
    --显示当前库中的所有表/系统表/视图
    --如果只显示其中几项,则通过指定 @table_type 的参数列表来实现
    --TABLE        代表用户表
    --SYSTEM TABLE 代表系统表
    --VIEW         代表视图
    exec sp_tables @table_type='''TABLE'',''SYSTEM TABLE'',''VIEW'''
    
    --显示指定表的表结构信息,sysobjects 是要显示的表名
    exec sp_columns 'sysobjects'
    
    
    
    
    
    SELECT TableName=o.name,OWNER=USER_NAME(o.uid),TableDescription=ISNULL(ptb.value,N''),
    	FieldId=c.colid,FieldName=c.name,
    	FieldType=QUOTENAME(t.name)
    		+CASE 
    			WHEN t.name IN (N'decimal',N'numeric')
    			THEN N'('+CAST(c.prec as varchar)+N','+CAST(c.scale as varchar)+N')'
    			WHEN t.name IN (N'float')
    				OR t.name like N'%char'
    				OR t.name like N'%binary'
    			THEN N'('+CAST(c.prec as varchar)+N')'
    			ELSE N'' END
    		+CASE WHEN c.isnullable=1 THEN N'' ELSE N' NOT' END+N' NULL',
    	FieldDescription=ISNULL(pfd.value,''),
    	DefileLength=c.length,
    	FieldDefault=ISNULL(df.text,N''),
    	IsIDENTITY=COLUMNPROPERTY(o.id,c.name,N'IsIdentity'),
    	IsComputed=COLUMNPROPERTY(o.id,c.name,N'IsComputed'),
    	IsROWGUID=COLUMNPROPERTY(o.id,c.name,N'IsRowGuidCol'),
    	IsPrimaryKey=CASE WHEN opk.xtype IS NULL THEN 0 ELSE 1 END
    FROM sysobjects o
    	JOIN syscolumns c
    		ON c.id=o.id
    			AND OBJECTPROPERTY(o.id,N'IsUserTable')=1
    	JOIN systypes t
    		ON t.xusertype=c.xusertype
    	LEFT JOIN syscomments df
    		ON df.id=c.cdefault
    	LEFT JOIN sysproperties ptb
    		ON ptb.id=o.id and ptb.smallid=0
    	LEFT JOIN sysproperties pfd
    		ON pfd.id=o.id and pfd.smallid=c.colid
    	LEFT JOIN sysindexkeys idxk
    		ON idxk.id=o.id
    			AND idxk.colid=c.colid
    	LEFT JOIN sysindexes idx
    		ON idx.indid=idxk.indid
    			AND idx.id=idxk.id
    			AND idx.indid NOT IN(0,255)
    	LEFT JOIN sysobjects opk
    		ON opk.parent_obj=o.id
    			AND opk.name=idx.name
    			AND OBJECTPROPERTY(opk.id,N'IsPrimaryKey')=1
    ORDER BY o.name,c.colid