How to find all the dependencies of a table in sql server

Besides the methods described in other answers (sp_depends system stored procedure, SQL Server dynamic management functions) you can also view dependencies between SQL Server objects - from SSMS.

You can use the View Dependencies option from SSMS. From the Object Explorer pane, right click on the object and from the context menu, select the View Dependencies option

I myself prefer a 3rd party dependency viewer called ApexSQL Search. It is a free add-in, which integrates into SSMS and Visual Studio for SQL object and data text search, extended property management, safe object rename, and relationship visualization.

The following are the ways we can use to check the dependencies:

Method 1: Using sp_depends

 sp_depends 'dbo.First'
 GO

Method 2: Using information_schema.routines

 SELECT *
 FROM information_schema.routines ISR
 WHERE CHARINDEX('dbo.First', ISR.ROUTINE_DEFINITION) > 0
 GO

Method 3: Using DMV sys.dm_sql_referencing_entities

 SELECT referencing_schema_name, referencing_entity_name,
 referencing_id, referencing_class_desc, is_caller_dependent
 FROM sys.dm_sql_referencing_entities ('dbo.First', 'OBJECT');
 GO

In SQL Server 2008 there are two new Dynamic Management Functions introduced to keep track of object dependencies: sys.dm_sql_referenced_entities and sys.dm_sql_referencing_entities:

1/ Returning the entities that refer to a given entity:

SELECT
        referencing_schema_name, referencing_entity_name, 
        referencing_class_desc, is_caller_dependent
FROM sys.dm_sql_referencing_entities ('<TableName>', 'OBJECT')

2/ Returning entities that are referenced by an object:

SELECT
        referenced_schema_name, referenced_entity_name, referenced_minor_name, 
        referenced_class_desc, is_caller_dependent, is_ambiguous
FROM sys.dm_sql_referenced_entities ('<StoredProcedureName>', 'OBJECT');

Alternatively, you can use sp_depends:

EXEC sp_depends '<TableName>'

Another option is to use a pretty useful tool called SQL Dependency Tracker from Red Gate.