SQL查询表的所有字段名

2023-08-24 12:52| 来源: 网络整理| 查看: 265

SQL SERVER

查看所有表名：

select name from sysobjects where type='U'

查询表的所有字段名：

Select name from syscolumns Where ID=OBJECT_ID('表名') select * from information_schema.tables select * from information_schema.views select * from information_schema.columns

查询某个表的列名称、说明、备注、类型等

------sqlserver 查询某个表的列名称、说明、备注、类型等 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 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='Sys_User' --如果只查询指定表,加上此where条件，tablename是要查询的表名；去除where条件查询所有的表信息 order by a.id,a.colorder

MySql 查询表的所有字段名：

select * from information_schema.columns where table_name='table_name' and table_schema='table_schema' ORDER BY ORDINAL_POSITION

ACCESS

查看所有表名：

select name from MSysObjects where type=1 and flags=0

MSysObjects是系统对象，默认情况是隐藏的。通过工具、选项、视图、显示、系统对象可以使之显示出来。

Oracle

select cname from col where tname='ZW_YINGYEZ' select column_name from user_tab_columns where table_name='ZW_YINGYEZ'

查询表字段数

select count(column_name) from user_tab_columns where table_name='表名';

https://www.cnblogs.com/qy1234/p/9044275.html

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