Sql 即使范围字段都被索引，方法的性能特征也可能不同（虽然在实践中，我不希望这样）。我希望我可以将两个答案都标记为已接受，但我必须先选择解决问题的答案。但两者都很棒 create function dbo.ValidateStatusPeriodInfoTime

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即使范围字段都被索引，方法的性能特征也可能不同（虽然在实践中，我不希望这样）。我希望我可以将两个答案都标记为已接受，但我必须先选择解决问题的答案。但两者都很棒

create function dbo.ValidateStatusPeriodInfoTimeRange
(
    @btf_id VARCHAR(32),
    @start_time BIGINT,
    @end_time BIGINT
)
returns bit
as
begin
declare @Valid bit = 1;

if exists( select *
           from   dbo.StatusPeriodInfoOccurrence o
           where  o.btf_id = @btf_id
           and    @start_time <= o.end_time and o.start_time <= @end_time )
   set @Valid = 0;
return @Valid;

alter table dbo.StatusPeriodInfoOccurrence with nocheck add constraint 

CK_StatusPeriodInfoOccurrence_ValidateTimeRange 
    check (dbo.ValidateStatusPeriodInfoTimeRange(btf_id, start_time, end_time) = 1);

The INSERT statement conflicted with the CHECK constraint 
"CK_StatusPeriodInfoOccurrence_ValidateTimeRange". The conflict occurred in 
database "D600600TD01_BSM_Surveillance", table "dbo.StatusPeriodInfoOccurrence".

DECLARE @ReturnValue INT
EXEC @ReturnValue =  ValidateStatusPeriodInfoTimeRange
@btf_id = 'a596933eff9143bceda5fc5d269827cd',
@start_time = 2432432,
@end_time = 432432423
SELECT @ReturnValue

INSERT INTO StatusPeriodInfoOccurrence (btf_id, start_time, end_time) VALUES ('a596933eff9143bceda5fc5d269827cd',2432432,432432423); 

select *
from   dbo.StatusPeriodInfoOccurrence o
where  o.btf_id = @btf_id
and    @start_time <= o.end_time and o.start_time <= @end_time

if (select count(*)
          from   dbo.StatusPeriodInfoOccurrence o
          where  o.btf_id = @btf_id
          and    @start_time <= o.end_time and o.start_time <= @end_time ) > 1

create function dbo.ValidateStatusPeriodInfoTimeRange
(
    @id INT,
    @btf_id VARCHAR(32),
    @start_time BIGINT,
    @end_time BIGINT
)
returns bit
as
begin
declare @Valid bit = 1;

if exists( select *
           from   dbo.StatusPeriodInfoOccurrence o
           where  o.id <> @id AND o.btf_id = @btf_id
           and    @start_time <= o.end_time and o.start_time <= @end_time )
   set @Valid = 0;
return @Valid;
end;

check (dbo.ValidateStatusPeriodInfoTimeRange(id, btf_id, start_time, end_time) = 1)