mysql查询动态表名的数据类型_查询数据库中的表名、属性值
及其数据类型
查询数据库结构信息：
表名  =case lorder=1 then d.name else '' end,
表说明  =case lorder=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 lid
))) 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  =,''),
字段说明=isnull(g.[value],'')
example:
1 SELECT
2 FROMsyscolumns a
3 left join systypes b on a.xusertype=b.xusertype
4 inner join sysobjects d on a.id=d.id pe='U' and d.name<>'dtproperties'
5 left join syscomments e on a.cdefault=e.id
6 left join sysproperties g on a.id=g.id lid=g.smallid
7 left join sysproperties f on d.id=f.id and f.smallid=0
8 --where d.name='要查询的表' --如果只查询指定表，加上此条件
9 order by a.lorder
View Code
SQL2000系统表的应⽤：
获取当前数据库的所有表名称
select Name from sysobjects where xtype='u' and statu>=0
获取某⼀个表的所有字段
select name from syscolumns where id = object_id('表名')
查看与某个表相关的视图、存储过程、函数
select a.* from sysobjects a,syscomments b where a.id =b.id like'%表名'
查看当前数据库中所有存储过程
select name as存储过程名称 from sysobjects where xtype = 'P'
查询⽤户创建的所有数据库
select * from master..sysdatabases D where sid not in(select sid from master..syslogins where name='sa')
mysql创建表数据类型
查询某⼀个表的字段和数据类型
select column_name,data_type lumnswhere table_name = '表名'
取得表字段的描述
selectname,
(select value from sysproperties where id = syscolumns.id and lid) as描述from syscolumns where id=object_id('表名')
所有表的所有字段的类型
select c.Name as TableName,b.name as ColName,a.name asType,a.lengthfromsyscolumns a,systypes b,sysobjects
pe= 'U' pe and a.id=c.id

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