SQL Server 2012 :: Rank On Repeating Groups Of Bit Field?
Jan 16, 2015
I have some data where a bit value changes over time and I want to rank it by the repeating groups, how do I write the SQL so that I get the result below?
I want to sort by create date, and every time the bit changes value we start the rank over.
If I partition by the bit field, it will just group the entire data set by the bit field.
Bit CreateDate Rank
1 3/15/2014 1
1 3/14/2014 2
0 3/9/2014 1
0 3/8/2014 2
0 3/6/2014 3
1 3/4/2014 1
0 2/28/2014 1
0 2/20/2014 2
0 2/15/2014 3
0 2/10/2014 4
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Jan 25, 2008
I have a new SQL 2005 (SP2) Reporting Services server to which I've just upgraded and deployed some SSRS 2000 reports.
I have a subreport that contains a matrix with two groups. The report data seems to be inexplicably repeating the data for the first row in the group for all rows in the group. Example:
ID1
ID2
DisplayData
1
1
A
1
2
B
1
3
C
2
1
A
2
2
B
2
3
C
Parent group is on ID1, child group is on ID2, report would show:
1
1
A
2
A
3
A
2
1
A
2
A
3
A
Is this a matrix bug in 2005 SP2, or do I need to do something differently? I can no longer pull a comparison version from an SSRS 2000 server to verify, but I believe it was working as expected before...
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Mar 3, 2008
I wirte my query as:
select mydate
from mytable
group by mydate
ordre by mydate
The datatype of mydate column is DateTime. The result is showing me same repeating groups e.g.
2/27/2008 12:00:00 AM
2/27/2008 12:00:00 AM
2/27/2008 12:00:00 AM
Please help so that my query can give me unique groups.
Regards,
Professor Corrie.
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Jan 9, 2014
We have accounts that pay for a particular "premium" service. It's entirely possible an account paid for this service for three consecutive months in 2013, then stopped paying, then started paying again. Why I'm trying to establish is, for the FIRST period of time the accout paid for this service, for how many consecutive months did they pay? Here is my test data:
if object_id('tempdb..#SampleData') is not null
drop table #SampleData
go
if object_id('tempdb..#DateAnalysis') is not null
drop table #DateAnalysis
go
-- Create temp tables for sample data
create table #SampleData
(AccountID int,
RandomDate datetime)
create table #DateAnalysis
(RowID int identity(1,1),
AccountID int,
RandomDate datetime,
NextDate datetime,
LeadInMonths int)
-- Insert some sample data
insert into #SampleData values
(1, '1/1/13'), (1, '2/1/13'), (1, '3/1/13'), (1, '6/1/13'), (1, '10/1/13'), (1, '11/1/13'), (1, '12/1/13'),
(2, '1/1/13'), (2, '4/1/13'), (2, '5/1/13'), (2, '6/1/13'),
(3, '2/1/13'), (3, '3/1/13'), (3, '4/1/13'), (3, '9/1/13'), (3, '10/1/13'), (3, '11/1/13')
-- Use lead function to determine how many months are between
-- consecutive dates per account
; with DateInterval as
(select AccountID, RandomDate,
NextDate = lead (RandomDate, 1, NULL) over (partition by AccountID order by RandomDate)
from #SampleData)
insert into #DateAnalysis
select AccountID, RandomDate, NextDate,
datediff(mm, RandomDate, NextDate) as 'Lead'
from DateInterval
where NextDate is not null -- Last row will contain NULL for NextDate. Don't include these rows.
-- Show the results
select *,
'NTile' = NTILE(3) over (partition by AccountID order by RandomDate),
'RowNum' = row_number() over (partition by AccountID order by RandomDate)
from #DateAnalysis
Results (this is not getting me what I'm looking for):
RowIDAccountIDRandomDateNextDateLeadInMonthsNTileRowNum
11 2013-01-012013-02-01111
21 2013-02-012013-03-01112
31 2013-03-012013-06-01323
41 2013-06-012013-10-01424
51 2013-10-012013-11-01135
61 2013-11-012013-12-01136
72 2013-01-012013-04-01311
82 2013-04-012013-05-01122
[code]....
This is what I'm trying to achieve:
RowIDAccountIDRandomDateNextDateLeadInMonthsRankForThisLeadInMonths
11 2013-01-012013-02-0111
21 2013-02-012013-03-0111
31 2013-03-012013-06-0132
41 2013-06-012013-10-0143
51 2013-10-012013-11-0114
61 2013-11-012013-12-0114
[code]....
The problem comes with accounts like AccountID = 1. They paid consecutively to start, then skipped, then started paying consecutively again. When using window functions, I'm running into trouble attempting to partition by AccountID and LeadInMonths. It's putting all the LeadInMonths = 1 together and that will give me skewed results if I want to know the earliest and latest date within the FIRST consecutive range of dates where the account paid. I've tried NTILE but it expects an integer and there's no telling how many "tiles" would be in AccountID partition.
I've looked at the OVER clause and the new "ROWS BETWEEN" syntax and still cannot get the desired results.
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Jan 21, 2014
I have a dataset that contains an EmployeeID, StartDate, EndDate, and Location. Each record tells me at which location and employee was during a payroll period (fortnightly). So the data looks like:
EMP_KEYSTART_DTEND_DTLOCATION
120130117201301318103
120130117201301318103
120130131201302143354
120130131201302148103
220130117201301311234
220130131201302144567
120130214201302283354
220130214201302281234
Employees can be at multiple locations during the two weeks. They can work at one location, stop working there, start working somewhere else, and then maybe go back to their old location. There are duplicate records here as each employee can be at the same location multiple times during the two week period. What I need to capture is the actual start and end date of an employee at each location for each 'assignment'. An assignment is defined as a continual period of employment at a location with gaps of no less than 4 days - if there is a gap of more than four days then that is classed as a new assignment.
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Sep 15, 2015
I have a below table as:
IF OBJECT_ID('tempdb..#Test') IS NOt NULL
DROP TABLe #Test
--===== Create the test table with
create table #Test([Year] float,
Age Int,
)
INSERT INTO #Test
([Year], Age)
[Code]...
I queried below to get additional column
Select *,row_number() over(partition by [Year] order by Age) as RN from #Test as
YearAgeRN
2014301
2014312
2014323
2015251
2015262
2015273
2015284
2015295
i want one more addtional column (Desired Output) with max of RN in each group as below"
YearAgeRNDesired output
20152515
20152625
20152735
20152845
20152955
20143013
20143123
20143233
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Jun 15, 2015
I need to calculate the last two columns (noofgrp and grpsize) No of Groups (count of Clientid) and Group Size (number of clients in each group) according to begtim and endtime. So I tried the following in the first Temp table
GrpSize= count(clientid) over (partition by begtime,endtime) else 0 end
and in the second Temp Table, I have
select
,GrpSize=sum(grpsize)
,NoofGrp=count(distinct grpsize)
From Temp1
The issue is for the date of 5/26, the begtime and endtime are not consistent. in Grp1 (group 1) all clients starts the session at 1030 and ends at 1200 (90 minutes session) except one who starts at 11 and end at 1200 (row 8). For this client since his/her endtime is the same as others, I want that client to be in the first group(Grp1). Reverse is true for the second group (Grp2). All clients begtime is 12:30 and endtime is 1400 but clientid=2 (row 9) who begtime =1230 but endtime = 1300. However, since this client begtime is the same as the rest, I wan that client to be in the second group (grp2) My partition over creates 4 groups rather than two.
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Oct 18, 2007
does anyboy know how to not showing a group rows if one of its field value is zero?
thanks,
Addin
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Feb 11, 2014
Trying to find out if this is the best way to move log files in databases that are in an availability group.
remove the DB from the AG
Run alter database commands like you would normally to take offline ,move file,bring online ,etc
drop the db from secondary node
then rejoin the DB to the AG
Is that the only option for moving them when its in an avail group? cant find any other info on moving files in mirrors or HA groups
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Jun 30, 2014
I been trying to learn availability groups since I have not implemented it.
From my understanding you can have more than one group.
Lets pretend we have two groups in one instance:
1. Accounting
2. Engineering
From my understanding you can't make a database in two AG because it wouldn't make sense.
But lets pretending there is one database that both are used by accounting and engineering.
Would you have to make a third AG for future fail overs so that other databases in the other two group don't failover when not needed because when you fail over an AG all the databases inside it fail over.
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May 13, 2015
So, today we have the following:
Dallas: A 2 node Windows 2008 Cluster running SQL 2012 ENT cluster
Wash: A 2 node Windows 2008 Cluster running SQL 2012 ENT cluster
and I'm mirroring (synchronous, no witness) a database from Dallas to Wash.Crappy set up. I know.Now customer wants to have the database mirror to another server in Dallas.What are the high level steps to transform my two clusters to use Availability Groups and Always On?Do I need to basically start over and build a new environment?or can I transform my two disconnected cluster?
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Aug 12, 2013
From what I understand, one SQL Server 2012 instance can host multiple availability groups. That should allow, for example, the following situation - one SQL Server 2012 instance containing three primary replica databases - each one part of a different availability group - and each availability group's secondary replica located on a separate SQL Server 2012 instance.
Can you have three SQL Server 2012 instances, each with one primary replica database and have all three secondary replica databases on one SQL Server 2012 instance? So instead of, as above, going from 1 primary server to 3 secondary servers, this time we're going from 3 primary servers to 1 secondary server? The one secondary server would then contain all three secondary replicas for each of the 3 separate primary replicas.
This would mean that the single server (where all three secondary replicas reside) was part of three separate Windows Server Failover Clustering clusters.
Is this scenario possible?
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Feb 13, 2014
I have four instances and each instance have its own Availability Group with its own listener.
Would like to know if you can have one listener for multiple Availability groups?
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Apr 28, 2014
I am looking for the easiest way of rebalancing data across multiple files.
Instead of creating a secondary filegroup and then dropping and recreating all indexes in the database which is going to take ages (we have a lot of tables and indexes), I am trying to just add more files to the primary file group and then rebalance data evenly between these.
I guessed that adding the new files to the primary file group and then rebuilding all indexes on a table should redistribute the table over these multiple file groups evenly. This is not the case though. It does rebalance data a bit but I still end up with the majority on the first file that existed.
I have attached the script I am running, maybe it is something in the create database/file statements that is the issue.
Basically what I am seeing is to start off with the table is 160MB. I then add the file groups and rebuild all indexes on the table. The first file is then about 100MB and each of the three other files are about 20MB. I would expect them all to be the same size.
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Apr 28, 2014
We had 3 Availability Groups set up in SQL 2012 last year but they were poorly named so I am just looking to rename them but there doesn't seem to be any command for it that I can find.Can they not be renamed once created? I guess I could just create new ones and move the DB's into them but just thought I would check!
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Jul 30, 2014
We have a large Datawarehouse and the size is 50TB.. The tables are placed in filegroups based on the schema like fact, dimensions, raw data each sit on seperate filegroups. I am thinking will it make sense to seperate the large facts which are having billions of rows so that they reside on filegroups on their own..
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Aug 14, 2014
I have several 2012 availability groups running on a cluster. I have one database that is bulk loaded every 30 minutes. The DB is about 1 GB in size. To be on the availability group it has to be set to full recovery mode, but simple or even bulk would obviously be better. Is there a better way to handle the transaction log size other than to run a backup after each bulk load causing extra overhead? With mirrors you could use simple, but since those are going away . . .
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Aug 15, 2014
I would like synchronizing all the missing objects (logins, agent jobs, SSIS, and anything else that I've missed) across SQL 2012 Availability Groups.
I would like to be able to able to automate this process....
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Mar 20, 2015
We have a sorted data that looks like the first 3 columns below, and fourth colum is what I want to create)
Shift_start meal_break shift_endShift ID
1 0 0 1
0 0 0 1
0 0 1 1
1 0 0 2
0 0 0 2
0 0 1 2
I need to find a method to assign unique Shift IDS to rows that correspond to a single shift. For instance, the first shift would begin on the first row when shift_start flag is turned on, and end on the third row when shift_end flag is turned on.
Can I do this in SQL ?...some kind of grouping ?
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Sep 8, 2015
We have some tables that are bulk-loaded every day and they do not have RI to the other tables in the database.
To ease pressure on the logs, I had the idea of spinning them off to another database on the same AG in simple or bulk-load recovery model and using synonyms to point to them so the code base would not need changing.
I know an earlier bug in 2005 existed that basically made the query analyzer ignore indexes if a table was accessed via a synonym.
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Sep 15, 2015
We have multiple SQL 2012 SQL servers setup in an alwaysOn availability groups. Where should we schedule the re-index? We have Server1 as the primary and 2 secondaries Server2 and Server3. Are their any tricks to have it run on which ever one is the primary?
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Mar 21, 2014
I'm reading up on Always on and I am confused what is the difference between AlwaysOn Availability Groups and AlwaysOn Failover Cluster Instances.
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Jun 5, 2014
I have a two node SQL 2012 AlwaysOn HADR cluster (v11.0.3412) with 4 availability groups configured. The AG groups are set to synchronous mode and the secondary is not readable (we do not want the synchronous replica readable so we do not risk any reads causing contention so we maintain fast performance).
On the secondary we are getting a persistent failure with the Data Collector job called Collection_Set_3_Upload. The failure occurs within the second job step. That job step is executing the following command:
dcexec -u -s 3 -i "$(ESCAPE_DQUOTE(MACH))$(ESCAPE_DQUOTE(INST))"
The error message is as follows:
Log Job History (collection_set_3_upload) Step ID 2 Server CLUSTERNODE2
Job Name collection_set_3_upload
Step Name collection_set_3_upload_upload
Duration 00:00:07
[Code] ....
I know I can prevent this error message by enabling readable secondaries, but we do not want this.
I have tried stopping the data collection jobs and purging the cache directory but to no avail. It will succeed the first time then persistently fail again with the same message every time after that.
In addition, if I set the one failing AG group to readable secondary the job succeeds. So that means that 3/4 work fine, only this one is having an issue.
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Sep 17, 2014
When the database is configured for mirroring and you want to do partitioning on that database, How can we do? Is this similar process or any variation there while adding file groups and files? The partition will reflect in the mirroring database also?
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Oct 22, 2014
Approach 1:
Prod - shared storage between server 1 and 2
Server1: clustered SQL instance with availability group as primary
Server2: Passive server for clustered instance of PROD
DR - shared storage between server 1 and 2
Server1: Clustered SQL instance with availability group as replica
Server2: Passive server for clustered instance of DR
Approach 2: Using replicated SAN
Prod -
Server 1: Standalone instance with availability group as Primary
Server 2:Standalone instance with availability group as replica
DR -
Server 1: Offline until Disk group 1 (Prod server 1) has been broken and brought online at DR
Server 2: Offline until Disk group 2 (Prod server 2) has been broken and brought online at DR
Both these approaches will work wont they? I have only built and played with normal availability groups across servers, not mixing it with clustered instance replicated SAN
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Jun 9, 2015
I inherited a SQL 2012 Ent server sitting on a 2008R2 server using AlwaysOn High Availability, two nodes.
Available Mode: Synchronous commit
Failover Mode: Manual
Connection in Primary role: Allow all connections
Readable secondary: No
seesion timeout: 10
Somebody decided to give SQL server priority boost so I need to change this ASAP. So I plan on doing the following.
1. Manually fail over to the secondary, which does not have the priority boost set to true
2. change the setting
3. restart the service
4. Manually fail over
My question is with the service restart. How does SQL handle if the DB changes on the new primary while the secondary is having the service restarted. Where can I see if the DB are sync again or if not where are they in the sync process.
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Aug 21, 2014
OK, so I have:
- 500 GB DW
- 5 GB in smaller DBs
- 220 GB TempDB
- 350 GB in Log files.
My machine is Fujitsu Primergy 64 cores (with HT) and 192 GB RAM.
I have several IO locations:
- 540 GB in-server HDD 15k RAID10
- 1 TB HDD 15k RAID10 on SAN (separete controller)
- 2 TB HDD 15k RAID10 on SAN (same controlller as below)
- 800GB SSD RAID10 on SAN (same controller as above)
Data warehouse has 2 fact tables that are absolutely crucial and quite large.
Now i want to organize DB into several Filegroups and put them on different drives. Filegroups I'm thinking of:
- FILEGROUP1: for 1st crucial Fact Table
- FILEGROUP2: for 2nd crucial Fact Table
- FILEGROUP3: for tempDB
- FILEGROUP4: for dimensions data
- FILEGROUP5: for the rest of facts data
- FILEGROUP6: for dimensions indexes
- FILEGROUP7: for the rest of facts indexes
- FILEGROUP8: for 1 log file of one smaller DB (its in full-recovery and its quite large)
- FILEGROUP9: for the rest of log files
- FILEGROUP10: others
How should I organize them across available drives? I was thinking about sth like:
800 GB SSD: FILEGROUPS 1-3
2 TB RAID10: FILEGROUPS 5+7+8
1 TB RAID10: FILEGROUPS 4+6+10
540 GB in-server: FILEGROUP 9
I know that having multiple filegroups on the same drive is pointless regarding performance, but in future i could actually add some more drives, so i want to separate them now.
Also - how much files per filegroups should i create? Considering 1 or 2. Except TempDB where I am going for 4.
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Aug 23, 2014
I have a Function where I want to put a character in a particular position in a Destination string. For example, I have a 5 character field containing, say, "12345". I would like to put the letter "A" in the third position resulting in "12A45". I'm trying the following
DECLARE @RetVal as varchar(5)
SET SUBSTRING(@RetVal,3,1) = 'A'
I'm getting a compiler error
"incorrect syntax near '@RetVal'. Expecting '(' or SELECT"
Am I using the wrong Function to do this? If so, what should I be using?
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Aug 4, 2015
I have a query that displays a bunch of fields, specifically a createdon field and closedate field.I need to find the diff in days between date1 and date2 and only disiplay those results.For example: where the NumDays = a certain value. For example, 81.I have the NumDays displaying in the query, but I don't know how to reference these values in the where clause.
SELECT
TBU.businessunitidnameAS 'BU Name',
LEADS.statecodenameAS 'Status',
LEADS.statuscodeAS 'Status Code',
LEADS.accountidnameAS 'Account Name',
[code]...
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Dec 27, 2013
So for years I was using the int identity(1,1) primary_key for all the tables I created, and then in this project I decided, you know, I like the uniqueidentifier using newsequentialid() to ensure a distinctly unique primary key.
then, after working with the php sqlsrv driver, I realized huh, no matter what, i am unable to retrieve the scope_identity() of the insert
So of course I cruised back to the MSSMS and realized crap, I can't even make the uniqueidentifier an identity.
So now I'm wondering 2 things...
1: Can I short cut and pull the uniqueidentifier of a newly inserted record, even though the scope_identity() will return null or
2: do I now have to add a column to each table, keep the uniqueidentifier (as all my tables are unified by that relationship) and also add a pk field as an int identity(1,1) primary_key, in order to be able to pull the scope_identity() on insert...
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Feb 21, 2014
I am trying to update records based on the results of a query with a subquery.
The result set being produced shows the record of an item number. This result produces the correct ItemNo which I need to update. The field I am looking to update is an integer named Block.
When I run the update statement all records are updated and not the result set when I run the query by itself.
Below you will find the code I am running:
create table #Items
(
ItemNovarchar (50),
SearchNo varchar (50),
Historical int,
Blocked int
[Code] ....
Below is the code I am using in an attempt to update the block column but it updates all records and not the ones which I need to have the Blocked field set to 1.
Update #items set Blocked = 1
Where Exists
(
SELECT ItemNo=MAX(CASE rn WHEN 1 THEN ItemNo END)
--,SearchNo
--,COUNT(*)
[Code] ...
Why is the update changing each record? How can I change the update to choose the correct records?
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Oct 27, 2014
How to limit the length of a database field such that only first 12 characters are shown in the result?
For example, I have show the only first 12 characters of employee name.
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Oct 30, 2014
I have created table in which there are four columns (id, date, parcelname, parcelnumber) and 10 rows. I want to count record of the column parcelnumber but condition that, in between two different dates the record should be counted.
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