MYSQL查询全部表和表所有字段
Posted Asura2017
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最近在做一些关于BI的东西。
记录下。
数据库查询全部表名称和备注信息
- 只能查询表名
SHOW TABLES;
- 查询表名和表备注
SELECT TABLE_NAME tablename, TABLE_COMMENT remark FROM INFORMATION_SCHEMA.TABLES WHERE table_schema = "xxxx_xxxx" and TABLE_COMMENT != ""
根据表名查询全部字段信息
- 第一种,比较复杂,不知道和第二种有什么区别,
SELECT * FROM information_schema.COLUMNS WHERE table_schema = \'你的数据库名称\' AND table_name = \'你的表名\';
- 第二种
SHOW FULL COLUMNS FROM 你的表名
zzzzzzzzzzzz
SQLserver查询所有表和表下面所有列
SELECT (case when a.colorder=1 then d.name else null end) 表名, a.colorder 字段序号,a.name 字段名, (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) 标识, (case when (SELECT count(*) 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'))>0 then '√' else '' end) 主键,b.name 类型,a.length 占用字节数, COLUMNPROPERTY(a.id,a.name,'PRECISION') as 长度, isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小数位数,(case when a.isnullable=1 then '√'else '' end) 允许空, isnull(e.text,'') 默认值,isnull(g.[value], ' ') AS [说明] 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.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.class and f.minor_id=0 where b.name is not null --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
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