Methods for determining the existence of functions, stored procedures, etc. in SQL database

Below you introduce SQL under the use of a variety of resources to determine the existence of the code, the need for friends can refer to, I hope you learn SQL functions and databases can be helpful.
Whether the library exists
if exists (select * from Master.. sysdatabases where name=n ' library name ')
print ' exists '
Else
print ' NOT EXISTS '
---------------
--Determine if the name of the table to be created exists
if exists (SELECT * from dbo.sysobjects WHERE id = object_id (N ' [dbo].[ Table name] ') and OBJECTPROPERTY (ID, N ' isusertable ') = 1)
--Delete Table
drop table [dbo]. [Table name]
GO
---------------
--Determine if you want to create a temporary table exists
If object_id (' tempdb.dbo. #Test ') is not Null
Begin
print ' exists '
End
Else
Begin
print ' does not exist '
End
---------------
--Determine if the stored procedure name to be created exists
if exists (SELECT * from dbo.sysobjects WHERE id = object_id (N ' [dbo].[ Stored procedure name] ') and OBJECTPROPERTY (ID, N ' isprocedure ') = 1)
--Delete stored procedures
drop procedure [dbo]. [Stored procedure name]
GO
---------------
--Determine if the name of the view you want to create exists
if exists (SELECT * from dbo.sysobjects WHERE id = object_id (N ' [dbo].[ View name] ') and OBJECTPROPERTY (ID, N ' isview ') = 1)
--Delete View
Drop view [dbo]. [View name]
GO
---------------
--Determine if the name of the function to be created exists
if exists (SELECT * from dbo.sysobjects WHERE id = object_id (N ' [dbo].[ Function name] ') and xtype in (n ' FN ', n ' IF ', n ' TF '))
--delete function
Drop function [dbo]. [function name]
GO
If Col_length (' Table name ', ' column name ') is null
print ' does not exist '
Select 1 from sysobjects where ID in (select ID from syscolumns where name= ' column name ') and name= ' table name '

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Methods for determining the existence of functions, stored procedures, etc. in SQL database