SQL Server 2012 :: Data Compare To Identify Change
Mar 3, 2015
I am in process to develop TSql code to identify change in data.
I read about Binary_checksum and hashbyte. Some people say hashbyte is better than binay_checksum as chances of collision are less.
But if we may consider following, chances exist in hashbyte too. My question is what is the best way to compare data to identify change (I can't configure CDC) ?
select HASHBYTES('SHA','121'+'34'), HASHBYTES('SHA','12'+'134'),BINARY_CHECKSUM('121','34'),BINARY_CHECKSUM('12','134');
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Jan 29, 2014
Is there a efficient way to compare two different columns of 2 different rows in a data set as shown below.
For eg: I would like to DateDiff between Date2 of RowID 1 and Date1 of RowID 2 of IDNo 123. After this comparision , if datediff between two dates are <=14 then i want to update 1 else 0 in IsDateDiffLess14 of RowID1 . In below example its 0 because datediff of two dates >=14. So, want to compare the Date2 and Date1 in this sequence for the same IDNo. For RowID 6 there is only 1 row and no other row to compare, in this case IsDateDiffLess14 should be updated with 0.
RowID IDNo Date1 Date2 IsDateDiffLess14
1 123 04/10/2013 04/12/2013 0
2 123 05/10/2013 05/11/2013 1
3 123 05/21/2013 05/25/2013 0
4 112 01/10/2013 01/14/2013 1
5 112 01/27/2013 01/28/2013 0
6 120 03/10/2013 03/12/2013 0
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Jun 30, 2015
How can I easily identify who dropped a table?
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May 25, 2015
Our business get orders through the week with the weekends (Fri & Sat) orders being higher than weekdays. Im wanting to graph this years data with last years and possible the years before but to compare days in such a way that the all the weekdays line up. so comparing 2015 week 1 with 2014 week 1 but with 03/01/2015 (Sat) lining up with 04/01/2014 (Sat) etc.
I'm looking for alternatives to adding or removing days from the dates to solve this issue, i have a date dimension table for the past 5 years that i can use to compare calendar week 201401 with calendar week 201501 but I am finding it a bit inflexable.
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Jul 15, 2015
I have the following sets of records:
ColA ColB
----- -----
21 A
22 A
23 A
24 B
25 B
26 D
What I want is to be able to identify a set sequence (1,2,3) based upon ColB such that I'd get the following result:
ColA ColB ColC
----- ----- -----
21 A 1
22 A 1
23 A 1
24 B 2
25 B 2
26 D 3
I know that I should be able to get it using ROW_NUMBER() OVER (PARTITION BY ColB ORDER BY ColA), but instead of getting the sequence (1,1,1,2,2,3) I get (1,2,3,1,2,1). Using DENSE_RANK gave me the same results.
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Aug 29, 2014
I need to extract a price from a package solution table that was current on a certain date.
Columns are:
Product_Reference int,
Change_Date int, -- Note that this is in yyyymmdd format
Price decimal
So for one items you would get
Product_ReferenceChange_DatePrice
100014200401281.59
100014200605131.75
100014200802121.99
100014200906252.35
100014201002242.50
100014201107151.10
100014201205151.15
The challenge is to return the price of the item on 20070906. In this example 1.75.
I've tried joining it to itself
SELECT DISTINCT p1.[Product_Reference]
,p1.[Change_Date]
,p1.[Price]
FROM PHistory p1
INNER JOIN PHistory p2
ON p1.Product_Reference = p2.Product_Reference
WHERE p1.Product_Reference = 100014
AND p1.Change_Date >= 20070906
and p2.Change_Date < 20070906
But it returns the price above and below that date.
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Jul 23, 2014
I want to identify rows that go negative but only for 2 cents or more as well as identify rows that 2 or more.
I have this expression that does not work how I want it to work:
CASE
WHEN (SUM(FavUnfavCostChange) < (2/100) THEN 'Less'
WHEN SUM(FavUnfavCostChange) > (2/100) THEN 'More'
ELSE NULL
END AS 'Flag'
But I get:
0.00000815000000000000More -- this is not more than 2 cents, is just a positive number
-0.00094700000000000000Less -- this is not less than 2 cents, is just negative number
-0.00222000000000000000Less -- this is not less than 2 cents, is just negative number
-0.00012250000000000000Less -- this is not less than 2 cents, is just negative number
0.00000000000000000000NULL -- this is zero so null is fine
0.01188576000000000000More -- this is not more than 2 cents, is just a positive number
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Aug 12, 2014
I want Compare two Table data and insert changed field to the third table ...
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Apr 18, 2008
DECLARE @EffLevels TABLE (ChangePoint int, Value Int)
INSERT@EffLevels
SELECT'1000', '767' UNION ALL--Changed
SELECT'1000', '675' UNION ALL
SELECT'1001', '600' UNION ALL--Changed
SELECT'1001', '545' UNION ALL
SELECT'1001', '765' UNION ALL
SELECT'1000', '673' UNION ALL--Changed
SELECT'1002', '343' UNION ALL--Changed
SELECT'1002', '413' UNION ALL
SELECT'1002', '334' UNION ALL
SELECT'1001', '823'--Changed
-- My Result should be
-- ChangePointPrevChangePointValue
-- 1000Null767
-- 1001 1000 675
-- 1000 1001 765
-- 1002 1000 343
-- 1001 1002 823
Any suggestion ?
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Apr 21, 2014
I am using SQL Server 2012 and to me a part of data captured by CDC is not making sense.
I have a table called 'Schema.Table1', and I enabled CDC on it by running 'sys.sp_cdc_enable_table'. I see that a table called 'cdc.Schema_Table1_CT' got created which now gets an entry when ever I Insert, Update or delete a record in the original table.
Till this point every thing works fine.
My original Table has a NOT NULL INT column called 'AuditTrackerUserID' with a default value of 1996. My application does not provides a value for this column, but because the column itself has a default value, records get inserted without error.
When I try to execute the following Query I see multiple records with __$operation of 3 and 1.
SELECT * from cdc.Schema_Table1_CT where AuditTrackerUserID IS NULL
My expectation is that I should not ever see any record returned by this query because AuditTrackerUserID is a not null column, but I do.
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Mar 19, 2015
I'm rewriting a huge FOR XML EXPLICIT procedure to use FOR XML PATH, and need to compare previous output to the refactored one, so i didn't mess up XML structure.
The thing is, i'm not sure that SQL Server will always generate exactly same xml **string**, so i'd rather not compare by:
WHERE CAST(@xml_old AS NVARCHAR(MAX)) = CAST(@xml_new AS NVARCHAR(MAX))
nor do i want to manually validate every node, since the generated xml-structure is quite complex.
compare xmls by their "semantic value" ?
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Apr 20, 2015
i have two tables.
Table A
IdName
101Dante
102Henry
103Harold
104Arnold
Table B
NumberName
102Dante
107Gilbert
109Harold
110Arnold
106Susan
112Marian
I want the result in table 3 like below, if value exists in Table A and not exists in Table B then the record should enter in table 3 with table name in new column, and vice versa.
Table C
Col1Col2
HenryTable A
Gilbert Table B
Susan Table B
Marian Table B
using below logic to get the values from tables..
select
t1.columnA
, t2.*
from
table1 t1
join table2 t2 on t2.columnB = t1.columnA
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May 6, 2015
using below script to compare two tables and get the values.
how to get the count of 'Table A' , 'Table B' , 'Table A & Table B' using below script.
Ex:
'Table A' -- 150
'Table B' -- 300
'Table A & Table B' -- 150
SELECT
Col1 = ISNULL(a.name,b.name),
Col2 =
CASE
WHEN ISNULL(a.name,'') = '' THEN 'Table B'
WHEN ISNULL(b.name,'') = '' THEN 'Table A'
ELSE 'Table A & Table B'
END
FROM #tableA a
FULL JOIN #tableB b
ON a.name = b.name;
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Aug 3, 2015
how would I compare a list of concrete values?
---table with items
SET NOCOUNT ON;
DECLARE @items TABLE (ITEM_ID INT, ITEM_NAME VARCHAR(10))
INSERT INTO @items (ITEM_ID, ITEM_NAME) SELECT 10,'ITEM 1'
INSERT INTO @items (ITEM_ID, ITEM_NAME) SELECT 11,'ITEM 2'
INSERT INTO @items (ITEM_ID, ITEM_NAME) SELECT 12,'ITEM 3'
INSERT INTO @items (ITEM_ID, ITEM_NAME) SELECT 13,'ITEM 4'
INSERT INTO @items (ITEM_ID, ITEM_NAME) SELECT 14,'ITEM 5'
INSERT INTO @items (ITEM_ID, ITEM_NAME) SELECT 15,'ITEM 6'
INSERT INTO @items (ITEM_ID, ITEM_NAME) SELECT 16,'ITEM 7'
INSERT INTO @items (ITEM_ID, ITEM_NAME) SELECT 17,'ITEM 8'
SELECT * FROM @items
-- table with categories
SET NOCOUNT ON;
DECLARE @categories TABLE (CAT_ID INT, CAT_NAME VARCHAR(10))
INSERT INTO @categories (CAT_ID, CAT_NAME) SELECT 100,'WHITE'
INSERT INTO @categories (CAT_ID, CAT_NAME) SELECT 101,'BLACK'
INSERT INTO @categories (CAT_ID, CAT_NAME) SELECT 102,'BLUE'
INSERT INTO @categories (CAT_ID, CAT_NAME) SELECT 103,'GREEN'
INSERT INTO @categories (CAT_ID, CAT_NAME) SELECT 104,'YELLOW'
INSERT INTO @categories (CAT_ID, CAT_NAME) SELECT 105,'CIRCLE'
INSERT INTO @categories (CAT_ID, CAT_NAME) SELECT 106,'SQUARE'
INSERT INTO @categories (CAT_ID, CAT_NAME) SELECT 107,'TRIANGLE'
SELECT * FROM @categories
--table where categories are assigned to master categories
SET NOCOUNT ON;
DECLARE @master_categories TABLE (MASTERCAT_ID INT, CAT_ID INT)
INSERT INTO @master_categories (MASTERCAT_ID, CAT_ID) SELECT 1,100
INSERT INTO @master_categories (MASTERCAT_ID, CAT_ID) SELECT 1,101
INSERT INTO @master_categories (MASTERCAT_ID, CAT_ID) SELECT 1,102
INSERT INTO @master_categories (MASTERCAT_ID, CAT_ID) SELECT 1,103
INSERT INTO @master_categories (MASTERCAT_ID, CAT_ID) SELECT 1,104
INSERT INTO @master_categories (MASTERCAT_ID, CAT_ID) SELECT 2,105
INSERT INTO @master_categories (MASTERCAT_ID, CAT_ID) SELECT 2,106
INSERT INTO @master_categories (MASTERCAT_ID, CAT_ID) SELECT 2,107
SELECT * FROM @master_categories
-- items-categories assignment table
SET NOCOUNT ON;
DECLARE @item_categories TABLE (CAT_ID INT, ITEM_ID INT)
INSERT INTO @item_categories (CAT_ID, ITEM_ID) SELECT 100,10
INSERT INTO @item_categories (CAT_ID, ITEM_ID) SELECT 105,10
INSERT INTO @item_categories (CAT_ID, ITEM_ID) SELECT 100,11
INSERT INTO @item_categories (CAT_ID, ITEM_ID) SELECT 105,11
[code]....
So now I need to query the table @t4 in and to determine the items that are assigned to category 'WHITE' in master category 1 and to 'CIRCLE' in master category 2.The important thing is to return items that are assigned solely to 'WHITE' in master cat 1 and solely to 'CIRCLE' in master cat 2.In the above example it would be only the ITEM 1 (id=10) that is returned:
1. ITEM 2 (id=11) is not returned because it has the assignment to category 'SQUARE' in master cat 2 additionally
2. ITEM 3 (id=12) is not returned because it has the assignment to category 'BLACK' in master cat 1 additionally
3. ITEM 4 (id=13) is not returned as it does not have assignment to category 'CIRCLE' in master cat 2 but only to 'WHITE' in master cat 1
3. ITEM 5 (id=14) is not returned as it does not have assignment to category 'WHITE' in master cat 1 but only to 'CIRCLE' in master cat 2
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Feb 1, 2012
I am task with identifying the source database name, id, and server name for each staging table that I create. I need to add this to a derived column on all staging tables created from merging same tables on different servers together.
When doing a Merge Join, there is no way to identify the source of data so I would like to see if data came from one database more than the other servers or if their are duplicates across servers.
The thing that bugs me about SSIS Data Flow task is there is no way to do an easy Execute SQL Task after I select my ADO.NET Source to get this information because my connection string is dynamic and there is no way of know which data source is being picked up at runtime.
For Example I have Products table on Server 1 and 2:
Server 2 has more Products and would like to join the two together to create a staging table.
I want see the following:
Product ID, Product Name, Qty, Src_DB_ID, Src_DB_Name, Src_Server_Name
1 IPAD 1000 2, MyDB1, Server1
100 ASUS Pad 40 1, YourDB, Server2
get database name and server name in DATA FLOW only (without using a for each in Control Flow)
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Dec 29, 2014
how to identify the data leakage in a database , as I heard in one of my environment?
what is the meaning for data leakage ?
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Jan 21, 2015
I was running an operation to shrink file/emptyfile a data file, and then remove it.
It blocked and caused a huge mess, I suspect on the removal part. But I want to confirm that the emptyfile completed (and that the engine isn't going to try to put more data in there for when I schedule the removal part again a week or more from now).
How does the engine know not to put any more data in there, and how long does that situation last?
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Feb 25, 2015
I am struggling to come up with a set-based solution for this problem (i.e. that doesn't involve loops/cursors) ..A table contains items (identified by an ItemCode) and the set they belong to (identified by a SetId). Here is some sample data:
SetIdItemCode
1A
1B
24
28
26
310
312
410
[code]....
You can see that there are some sets that have the same members:
- 1 and 10
- 2 and 11
- 7, 8 & 9
What I want to do is identify the sets that have the same members, by giving them the same ID in another column called UniqueSetId.
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Dec 18, 2014
I run the script below once a day to keep track of row count over time. I would like to compare the results from today and yesterday to see if anyone deleted more than 20% of data from any given table. How would I do this? I really don't need the data anymore than a day just to compare the results.
Mon - Run script to collect row count
Tues - Run script to collect current row into temp table
,compare all row count in both tables
,purge records from Monday and insert current
Wed - Run script to collect current row into temp table
,compare all row count in both tables
[code]....
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Feb 18, 2015
What I need to be able to find is any records where the Discontinue_Date is greater than the Effective_Date on the next row for a given Customer ID and Part_ID. This is a customer pricing table so the Discontinue_Date of row 53 for example should never be greater than the Effective_Date of row 54130, these are the records I'm looking to find. So I'm looking for a SELECT query that would look for any records where this is true. Obviously the last Discontinue_Date row for a Customer_ID will not have a next row so I wouldn't want to return that.
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Mar 31, 2015
I have a table with two columns
id | filepath
--------------------------------------------------
1| D:Doc filesThe BestHHT.JPG
2| D:Doc filesThe Bestsealed_pack.txt
3| D:Doc filesThe Bestlsbom.JPG
4| D:Doc filesThe Bestmoc.png
5| D:Doc filesThe Beststock.txt
6| D:Doc filesThe Bestdepot.JPG
And in a physical system there are more files than the table.
D:Doc filesThe BestHHT.JPG
D:Doc filesThe Bestsealed_pack.txt
D:Doc filesThe BestJKSlsbom.JPG
D:Doc filesThe Bestmoc.png
D:Doc filesThe Beststock.txt
D:Doc filesThe BestGDNdepot.JPG
D:Doc filesThe BestCASA.JPG
D:Doc filesThe BestSO.txt
D:Doc filesThe BestBA.JPG
I want to compare the filepath column in table with physical drive files and get the details of files which in table and not in physical and viceversa...
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Oct 13, 2015
I am trying to write a function to compare the characters between 2 strings and eliminate the similarities to be able to return at the end the number of differences between them.
Having in mind i need the bigger number of differences to be returned also if a character is repeated in one of the 2 words it will be eliminated once because it exist only one time in other string.
I will give an example below to be more clear
--Start
declare @string1 as varchar(50)='imos'
declare @string2 as varchar(50)='nasos';
WITH n (n) AS (
SELECT 1 FROM (VALUES (1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) n (n)
[Code] ....
The differences in first string from second one are 2 (i,m) while the differences in second string from first one are 3(nas).
So the function should return 3 in previous example.
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Jul 18, 2014
I have an odd one. I have a SQL job that doesn't have a schedule and is being run each morning. It is a legacy system and I am trying to document the data flow process and I am having a hard time tracking down where/what is starting the job. I see which user executed the job:
SELECT message FROM sysjobhistory WHERE job_id = 'jobid' AND run_date > 'yesterday'
Which is useful, but I want to know what is starting the job.
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Oct 20, 2011
How do i check the size of the datacache allocated from the buffer pool by sql server?
DMV or anything to show me the pool allocation sizes for the various pools in sql server i think i may be able to work from there.
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Feb 5, 2015
Say you have a table that has records with numbers sort of like lottery winning numbers, say:
TableWinners
num1, num2, num3, num4, num5, num6
33 52 47 23 17 28
... more records with similar structure.
Then you have another table with chosen numbers, same structure as above, TableGuesses.
How could you do the following comparisons between TableGuesses and TableWinners:
1. Compare a single record in TableGuesses to a single record in TableWinners to get a count of the number of numbers that match (kind of a typical lottery type of thing).
2. Compare a single record in TableGuessess to ALL records in TableWinners to see which record in TableWinners is the closest match to the selected record in TableGuesses.
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Jan 15, 2015
How to find if there is a query that can be written on DMV's which will be able to retrieve the indexes that are not being used in a table.
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Feb 13, 2015
I have a SSAS stored procedure with a signature:
public Set DoSomthing(Set toBeProcessed, Set measuresToWorkWith)The set measurseToWorkWith is passed as {[Measures].[Measure1], [Measures].[Measure2] ...}
with the measures being real or query-scoped calculated members.
To get the value of the measure for each tuple in the set toBeProcessed, I create an Expression for each tuple (measure) in the set measuresToWorkWith then for each tuple in toBeProcessed call expression.Calculate(tuple) which returns a MDXValue.
My problem is that in order to make the code generic I need to get the real (.NET) data type of the MDXValue. The class only has explicit conversion methods ToInt16() etc which implies that the data type is known at design time.
However, if one of the measures is a query-scoped calculation then it could return a .NET double, int, bool or string.
If the measure is real then I can look up its metadata. However, it appears that if it is a formula (scoped member) then are all bets are off?
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Jul 8, 2015
I get the following error message when a job calls a Stored Procedure that TRUNCATES a Table:
Cannot truncate table 'CombinedSurveyData' because it is published for replication or enabled for Change Data Capture
Is my only option to change the TRUNCATE to DELETE?
[URL]
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Jun 30, 2015
Is there a way to identify who have changed the SQL port number other than the DBA's?
For example through c2 audit or any other triggers?
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May 12, 2015
Trying to determine what the minimum permissions i can grant to a user so they can see the change tracking data
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May 12, 2015
I would like to get extract the first row of some time based data where any of the other values changes. For example, in the following 10 rows
ABDTE
112015-01-01
112015-01-02
112015-01-03
212015-01-04
112015-01-05
1NULL2015-01-06
1NULL2015-01-07
212015-01-08
212015-01-09
222015-01-10
I want to remove the rows where A and B are the same as on the previous row. So rows 2, 3, 7 and 9 should be eliminated. Note that A and B can have the same values multiple times, just not in succession in the extract. I've tried ranking but I can't figure out how to keep it from lumping all the values of A and B in the same group. The following incorrectly eliminates rows 5 and 8:
;with data as (
select 1 as A, 1 as B, '2015-01-01' as DTE union
select 1 as A, 1 as B, '2015-01-02' as DTE union
select 1 as A, 1 as B, '2015-01-03' as DTE union
select 2 as A, 1 as B, '2015-01-04' as DTE union
[Code] .....
Of course the real data has many columns and multiple data types that can have nulls. I just want get the row when anything changes. Is there a slick way to do this in SQL?
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Aug 14, 2014
What issues will I encounter if I change the MSSQLSERVER password?
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Dec 5, 2014
I create a db by following code. Now I want to change name of FILEGROUP. How can I do it?
CREATE DATABASE MyDb
ON
PRIMARY ( NAME = MyDat,
FILENAME = 'c:datamydat.mdf'),
FILEGROUP MyGroup CONTAINS FILESTREAM( NAME = My,
FILENAME = 'c:datamy1')
[Code] .....
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