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How to get all tables without primary key in SQL Server?

There are many way to find tables without primary key one of them described below.


Select
   Table_CataLog as DB_NAME,
   Table_Schema as TBL_SCHEMA,
   Table_Name as TBL_NAME     
from
   information_schema.tables T    
where
   Not Exists(
      Select
         1
      from
         information_Schema.Table_Constraints C    
      where
         Constraint_Type='PRIMARY KEY'    
         and C.Table_Name=T.Table_Name    
         and C.Table_Schema=T.Table_Schema
   )    
   and Table_Type='BASE TABLE'



 This query will fetch all tables’ information which do not have primary key.

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