How to insert the correct range in sql server?

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Good Afternoon to all Developers,

The following is my "ODRange" table structure, Now if user enters the range

Minimum=23 Maximum=30 --Then its valid because that range doesn't exists in the table
Minimum=35 Maximum=40 --Invalid, Because the range b/n 31 to 37 already exists.Overlapping Should be avoided

So how to check whether the user enters the correct range or not, On basis of that comparision, We have to display whether its valid or not..

Minimum  Maximum
1	10
11	22
31	37
45	52
58	69
70	86
87	90
97	102
103	107

The range should be inserted at the particular position.

Thanks in Advance for any suggestion..!

Posted 24-Apr-12 0:38am

The Doer

Updated 24-Apr-12 0:49am

v2

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4 solutions

Solution 1

use 2 parameters in sqlcommand object for min and max entered by user
create datareader to run query select * from tab where min=@1 and max=@2
and see if dr.HasRows return true for simple (dr is object of DataReader)

oR

use exists in SQl query
the link for using details is

http://msdn.microsoft.com/en-us/library/ms188336.aspx[^]

use any option you prefer

Best of Luck!!

Posted 24-Apr-12 0:48am

Mantu Singh

Comments

The Doer 24-Apr-12 7:59am

sorry,am not using .net, its SQL server.

We can't use exists here because
Minimum=23 Maximum=30
is not exists still its invalid, and there's no function as overlap in SQL Server..

Solution 4

Hi,
Following will solve your purpose..

SQL

declare @min int
declare @max int

set @min= 35
set @max= 40


if exists(select * from ODRange where (minimum<=@min and maximum >=@min) or (minimum<=@max and maximum >=@max))
print 'Invalid Range'
else
insert into ODRange values(@min,@max)

Posted 26-Jun-13 23:11pm

Adarsh chauhan

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_Amy · Accepted Answer · 2013-06-25T23:35:00

Solution 2

The overlap can be find using the following query:

SQL

IF EXISTS (SELECT 1 FROM ODRange WHERE 31 <= maximum AND 37 >= Minimum)
  print 'Overlaps'
ELSE
  print 'Does not overlap'

--Amit

Posted 25-Jun-13 23:35pm

_Amy

Comments

The Doer 27-Jun-13 23:05pm

sahi he kamine , Jeete raho! +5

_Amy 27-Jun-13 23:09pm

Welcome. ;)

gvprabu · Accepted Answer · 2013-06-27T02:34:00

Hi,

Check the below sample...

SQL

--Step 1

--CReate the sample table


CREATE TABLE [OD] (
	[Mini] [int] NULL ,
	[maxi] [int] NULL 
) ON [PRIMARY]
GO


--Step 2 

--Insert some sample values

INSERT INTO OD (Mini, Maxi) VALUES (7,20)
INSERT INTO OD (Mini, Maxi) VALUES (40,50)
INSERT INTO OD (Mini, Maxi) VALUES (80,100)


--Step 3

--Check the validity by using the below query

DECLARE @MinVal AS INT
DECLARE @MaxVal AS INT

--input parameters
SET @MinVal = 87
SET @MaxVal = 90
--business rules to chk whether the new values overlap with existing entry
--it will display some records if the values overlap 
--If no records given as output- then the values are VALID

IF EXISTS (SELECT  OD.Mini, OD.Maxi 
FROM OD
WHERE (@MinVal >= OD.Mini AND @MinVal <=OD.Maxi)
OR (@MaxVal >= OD.Mini AND @MaxVal <=OD.Maxi)
OR (OD.Mini >= @MinVal AND OD.Mini <=@MaxVal) )
SELECT 'Invalid' 'Status'
ELSE
SELECT 'Valid' 'Status'

-- to display all the records
Select OD.Mini, OD.Maxi from OD

Regards,
GVPrabu