从Sql Server查询所有用户定义的类型？

Question

我如何从sql server中查询所有用户定义的数据类型，就像我对存储在sysobjects中的数据库对象执行此操作的方式一样。

Answer 1

In SQL Server 2005 (and above) you can do this

SELECT * FROM sys.Types WHERE is_user_defined = 1

If you are on SQL Server 2000, you can use SysTypes. I think the query is as follows:

SELECT * FROM SysTypes WHERE xusertype > 256

Answer 2

There is no standard query to get all the User defined databases alone. We can use

select * from sys.databases

But it shows all the Databases, I'm using Server management studio. So by default i have the following databases named : 'Master','tempdb','msdb','model'

So i always use this following query to get the user defined databases.

select * from sys.databases where name not in('master','model','msdb','tempdb')

It works for fine. If you have extra databases by default, it will be the Following (resource,distribution,reportservice, reportservicetemp). Just use the names in that query.

Answer 3

You can use the sys.types view for this. When user_type_id and system_type_id are different, you have a user type.

As AakashM says, the sys.types view is only available from SQL Server 2005 and higher.

EDIT: A better way to determine whether a type is a user-defined type is to check the is_user_defined flag (see Tim C's answer).

Answer 4

If you are still on SQL Server 2000 (as your use of ' sysobjects ' suggests), look in systypes . If you are on SQL Server 2005 or later, as rwwilden says you should use sys.types (and move to using sys.objects rather than sysobjects !)

Answer 5

You can use the INFORMATION_SCHEMA views. INFORMATION_SCHEMA.ROUTINES has UDFs and Stored Procs. INFORMATION_SCHEMA.TABLES has tables and views.

Answer 6

Actually system_type_id being different from user_type_id is NOT a good indication. Note that this:

SELECT * FROM sys.Types 
WHERE (system_type_id <> user_type_id)
AND is_user_defined = 0.

Returns these:

• hierarchyid
• geometry
• geography
• sysname

So use SELECT * FROM sys.types WHERE is_user_defined = 1 as was pointed out by Tim C and Ronald Wildenberg

Answer 7

You can also find these in INFORMATION_SCHEMA.DOMAINS. personally I prefer to use that over the sys schema, as it's an ANSI standard that works over multiple types of databases.