sql server - How does 12/30/9999 date in SQL work in a stored procedure? -


i'm reading stored procedure , noticed date parameter default 12/30/9999 , in condition. how work in stored proc?

in parameter section..

alter procedure [dw].[sp_policydetail] @inforcedate date = '12/30/9999', @policyeffectivedatestart date = null, @policyeffectivedateend date = null, @underwriter_full_name varchar(100) = null, @branch_office_name varchar(100) = null

in condition..

where p.line_of_business_cd= 'exp'  , p.policy_status_cd<> 'tmp'         , (   @inforcedate = '12/30/9999') or      (   p.policy_status_cd= 'bnd'                  , p.policy_effective_dt<= @inforcedate                  , p.policy_expiration_dt > @inforcedate                  , p.cancellation_effective_dt > @inforcedate                 )         )     , (@policyeffectivedatestart null or          (p.policy_effective_dt between @policyeffectivedatestart , @policyeffectivedateend))       , p.from_date <= @inforcedate     , p.to_date > @inforcedate

sql server can convert strings date using default server date format mm/dd/yyyy in case.

sql server can convert strings of valid format cast , convert if need, , provide format


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