SQL获取所有数据库名、表名、储存过程以及参数列表
1.获取所有用户名:
SELECT?name?FROM?Sysusers?where?status='2'?and?islogin='1'
islogin='1'表示帐户
islogin='0'表示角色
status='2'表示用户帐户
status='0'表示糸统帐户
2.获取所有数据库名:
SELECT?Name?FROM?Master..SysDatabases?ORDER?BY?Name
3.获取所有表名
SELECT?Name?FROM?DatabaseName..SysObjects?Where?XType='U'?ORDER?BY?Name
XType='U':表示所有用户表;
XType='S':表示所有系统表;
4.获取所有字段名:
SELECT?Name?FROM?SysColumns?WHERE?id=Object_Id('TableName')
5.获取数据库所有类型
select?name?from?systypes?
6.获取主键字段
SELECT??name?FROM?SysColumns?WHERE?id=Object_Id('表名')?and?colid=(select?top?1?keyno?from?sysindexkeys?where?id=Object_Id('表名'))
[综合网络资料整理]
1.获取所有数据库名:
?? (1)、Select Name FROM Master..SysDatabases order?by Name
2.获取所有表名:
?? (1)、Select Name FROM SysObjects Where XType='U' orDER BY Name
?????????? XType='U':表示所有用户表;
?????????? XType='S':表示所有系统表;
?? (2)、SELECT name FROM sysobjects WHERE type = 'U' AND sysstat = '83'
?????????? 注意:一般情况只需要type = 'U',但有时候会有系统表混在其中(不知道什么原因),加上后面一句后就能删除这些系统表了
3.获取所有字段名:
(1)、Select Name FROM SysColumns Where id=Object_Id('TableName')
(2)、SELECT syscolumns.name,systypes.name,syscolumns.isnullable,syscolumns.length FROM syscolumns, systypes WHERE syscolumns.xusertype = systypes.xusertype AND "syscolumns.id = object_id('tableName')
?????? 注意点:
???? (a)这里为了重点突出某些重要内容,选取了其中几项信息输出。
???? (b)syscolumns表中只含有数据类型编号,要获取完整的名字需要从systypes表中找,一般用户使用的数据类型用xusertype对应比较好,不会出现一对多的情况。
???? (c)syscolumns.length得到的是物理内存的长度,所以nvarchar和varchar等类型在数据库中的显示是这个的一半。
4、得到表中主键所包含的列名:
??? SELECT syscolumns.name FROM syscolumns,sysobjects,sysindexes,sysindexkeys WHERE syscolumns.id = object_id('tablename') AND sysobjects.xtype = 'PK' AND sysobjects.parent_obj = syscolumns.id AND sysindexes.id = syscolumns.id AND sysobjects.name = sysindexes.name AND sysindexkeys.id = syscolumns.id AND sysindexkeys.indid = sysindexes.indid AND syscolumns.colid = sysindexkeys.colid
注意:这是在4张系统表中寻找的,关系比较复杂,大致可以表示为:
syscolumns中存有表中的列信息和表id,sysobjects表中存有主键名字(即PK_Table类似)和表id,sysindexes中存 有主键名字和表id和index编号,sysindexkeys中存有表id和index编号和列编号,一项一项对应起来后就能找到列名了。
?
另外的SQL代码
select syscolumns.name, systypes.name, syscolumns.length from syscolumns???
? left join systypes on syscolumns. xusertype =systypes. xusertype?
? where id=(select id from sysobjects where name='订货主档');
go;
或者用这样的写法,执行结果一样:
select syscolumns.name, systypes.name, syscolumns.length from syscolumns,systypes
where (syscolumns.id=object_id('订货主档') and syscolumns.xusertype=systypes.xusertype)
order by syscolumns.colorder;
go
执行结果:(字段只出现一次,正常)
订单号码??? int 4
客户编号??? nvarchar??? 10
员工编号??? int 4
订单日期??? datetime??? 8
要货日期??? datetime??? 8
送货日期??? datetime??? 8
送货方式??? int 4
运费??? money?? 8
收货人? nvarchar??? 80
送货地址??? nvarchar??? 120
送货城市??? nvarchar??? 30
送货行政区? nvarchar??? 30
送货邮政编码??? nvarchar??? 20
送货国家地区??? nvarchar??? 30
?
?
select syscolumns.name, systypes.name, syscolumns.length from syscolumns???
? left join systypes on syscolumns.xtype=systypes.xtype?
? where id=(select id from sysobjects where name='订货主档');
go;
执行结果:(部分字段出现两次,数据类型不同)
订单号码??? int 4
客户编号??? nvarchar?? 10
客户编号??? sysname??? 10
员工编号??? int 4
订单日期??? datetime?? 8
订单日期??? 出生日期类型??? 8
要货日期??? datetime?? 8
要货日期??? 出生日期类型??? 8
送货日期??? datetime?? 8
送货日期??? 出生日期类型??? 8
送货方式??? int 4
运费??? money? 8
运费??? 薪水类型??? 8
收货人? nvarchar?? 80
收货人? sysname??? 80
送货地址??? nvarchar?? 120
送货地址??? sysname??? 120
送货城市??? nvarchar?? 30
送货城市??? sysname??? 30
送货行政区? nvarchar?? 30
送货行政区? sysname??? 30
送货邮政编码??? nvarchar?? 20
送货邮政编码??? sysname??? 20
送货国家地区??? nvarchar?? 30
送货国家地区??? sysname??? 30
查询存储过程DepartmentSalaryInfo所有的信息,信息包含在系统视图syscolumns,systypes中
select syscolumns.*, systypes.* from syscolumns???
? left join systypes on syscolumns.xusertype=systypes.xusertype?
? where id=(select id from sysobjects where name='DepartmentSalaryInfo');
go
?
?
exec?? sp_procedure_params_rowset?? @procedure_name?? =?? 'DepartmentSalaryInfo';
go
执行结果:
北风贸易??? dbo DepartmentSalaryInfo;1?? @RETURN_VALUE 0?? 4?? 0?? NULL?? 0?? 3?? NULL?? NULL?? 10??? NULL?? NULL?? int int
北风贸易??? dbo DepartmentSalaryInfo;1?? @department?? 1?? 1?? 0?? NULL?? 1?? 129 10? 10? NULL??? NULL?? NULL?? varchar??? varchar
北风贸易??? dbo DepartmentSalaryInfo;1?? @average?? 2?? 2?? 0?? NULL?? 1?? 6?? NULL?? NULL?? 19??? NULL?? NULL?? money? money
北风贸易??? dbo DepartmentSalaryInfo;1?? @maximum?? 3?? 2?? 0?? NULL?? 1?? 6?? NULL?? NULL?? 19??? NULL?? NULL?? money? money
北风贸易??? dbo DepartmentSalaryInfo;1?? @minimum?? 4?? 2?? 0?? NULL?? 1?? 6?? NULL?? NULL?? 19??? NULL?? NULL?? money? money
?
?
--存储过程中的参数名,参数类型,参数长度
select syscolumns.name, systypes.name, syscolumns.length from syscolumns???
? left join systypes on syscolumns.xusertype=systypes.xusertype?
? where id=(select id from sysobjects where name='DepartmentSalaryInfo');