getting mismatched data instead of having same data

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getting mismatched data instead of having same data

nikki_d

Mr or Mrs. 500

Points: 569
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February 13, 2014 at 4:20 am

#282418

Hi
while working with data comparison I faced an issue of mismatched data instead of having same data. Please help if I am missing something. Below is Script
CREATE TABLE #TestAA(
[ID] [int] NOT NULL,
[value] [float] NOT NULL
)
CREATE TABLE #TestBB(
[ID] [int] NOT NULL,
[value] [float] NOT NULL
)
INSERT #TestAA ([ID], [value]) VALUES (643766584, -13219.24)
INSERT #TestAA ([ID], [value]) VALUES (643728333, -968.28000000000009)
INSERT #TestAA ([ID], [value]) VALUES (643753337, -103.2)
INSERT #TestAA ([ID], [value]) VALUES (643740302, 1022.29)
INSERT #TestAA ([ID], [value]) VALUES (643799525, 638.67)
INSERT #TestAA ([ID], [value]) VALUES (643736475, 8325.1700000000019)
INSERT #TestAA ([ID], [value]) VALUES (643624658, -158.75000000000003)
INSERT #TestAA ([ID], [value]) VALUES (643766122, 1594.45)
INSERT #TestAA ([ID], [value]) VALUES (643742180, 86868.98000000001)
INSERT #TestAA ([ID], [value]) VALUES (643755869, -4983.8799999999992)
INSERT #TestBB ([ID], [value]) VALUES (643624658, -158.75)
INSERT #TestBB ([ID], [value]) VALUES (643728333, -968.28)
INSERT #TestBB ([ID], [value]) VALUES (643766584, -13219.239999999998)
INSERT #TestBB ([ID], [value]) VALUES (643753337, -103.19999999999999)
INSERT #TestBB ([ID], [value]) VALUES (643740302, 1022.2900000000001)
INSERT #TestBB ([ID], [value]) VALUES (643799525, 638.67000000000007)
INSERT #TestBB ([ID], [value]) VALUES (643736475, 8325.17)
INSERT #TestBB ([ID], [value]) VALUES (643766122, 1594.4499999999998)
INSERT #TestBB ([ID], [value]) VALUES (643742180, 86868.98)
INSERT #TestBB ([ID], [value]) VALUES (643755869, -4983.88)
select A.ID, B.ID, A.Value, B.Value
FROM #TestAA A INNER JOIN #TestBB B ON A.ID = B.ID
WHERE A.Value <> B.Value
--or you can use
SELECT ID ,value FROM TestAA
except
SELECT ID, value FROM TestBB
Thanks

Viewing 4 posts - 1 through 3 (of 3 total)

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HanShi SSC-Dedicated Points: 33507 More actions · Answer 1

The problem is in the rounding of FLOAT values. A FLOAT value isn't a precise value.

You can see the difference where you substract the values, see the results from the query below.

select A.ID, B.ID, A.Value, B.Value, A.Value - B.Value as 'difference'

FROM #TestAA A INNER JOIN #TestBB B ON A.ID = B.ID

WHERE A.Value <> B.Value

** Don't mistake the ‘stupidity of the crowd’ for the ‘wisdom of the group’! **

SrcName Default port Points: 1460 More actions · Answer 2

everything is float representation

if you won't be able to change definition of table

just change query

select A.ID, B.ID, A.Value, B.Value

FROM #TestAA A

INNER JOIN #TestBB B ON A.ID = B.ID

WHERE cast( A.Value as decimal(18,2)) <> cast( B.Value as decimal(18,2))

nikki_d Mr or Mrs. 500 Points: 569 More actions · Answer 3

Thanks you all for guidance. Problem resolved by using decimal as data type .. Thanks again 🙂