SQL Server 2012 :: Parallel Update On Same Table But Different Columns
Aug 5, 2015
I have a table with 8 columns, I need to update data in multiple columns on this table, this table contains 1 million records, having single update was taking time so I broke the single update into multiple update statements and running multiple update statements in parallel, Each update statement updates different column.
This approach is working fine but I am getting the deadlock error.
Transaction (Process ID 65) was deadlocked on lock | communication buffer resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
I tried with various lock hints but no success.
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May 30, 2015
I want to compare two columns in the same table called start date and end date for one clientId.if clientId is having continuous refenceid and sartdate and enddate of reference that I don't need any caseopendate but if clientID has new reference id and it's start date is not continuous to its previous reference id then I need to set that start date as caseopendate.
I have table containing 5 columns.
caseid
referenceid
startdate
enddate
caseopendate
[code]...
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Feb 23, 2007
Hi all,
Does an UPDATE statment lock the entire table or just the rows that will be affected by the UPDATE?
I ask because -
Can I run UPDATE statements in parallel on the same table on the same column. The need for doing this is because the table is a large fact table. I plan to execute the same UPDATE statements on different time sections of the data to expedite the processing.
If the UPDATE statment lock the entire table then I cannot run an UPDATE in parallel. If the UPDATE statement just locks the rows that will be affected then maybe I can because rows affected will be different for each UPDATE.
Let me know.
Thanks,
Vivek
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Mar 18, 2015
I create a main program which will launch two jobs at a time, each job does some processes and at the end I'm trying to delete those jobs after storing the job details in one of the custom table I created (cleanup sub-program).
Out of two jobs I am able to store one job details (like job_name,job_id,start_time and end_time of the job) in the custom table and able to delete that job, but the job that's getting completed at the end is not getting captured nor getting deleted from sysjobs and sysjobhistory tables.
I had included this step (which will call the cleanup sub-program to store the job details and delete it) at the end. I can see that this cleanup procedure getting called from debug message but it is neither storing details nor deleting the job.
When I execute this cleanup program separately, it does store the job details and delete it.
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Jan 22, 2015
I have a stored procedure that calls several views that rely on each other. In the past these views used to go parallel and use up all 100% of the CPU (12 cores), and now when the same stored procedure runs it only uses 8% of the CPU (1 core). This extends the time spent on the query from roughly 10-15 sec to 2-3min. I'm not quite sure why this is happening.
Are there some obvious things to look at when optimizing views to utilize all cores/threads? Also, it doesn't matter if I set Cost Threshold for Parallelism to 1 or 50 or 5, it is always the same, and I have Max Degree of Parallelism set to 0 as well, which should mean to use all cores when available.
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Dec 23, 2013
I just created a new table with over 100 Columns and I need to populated just the first 2 columns.
The first columns to populate is an identify column that is the primary key. The second column is a foreign_key to an other column and I am trying to populate this columns with all the values from the foreign_key value. This is what I am trying to do.
column1 = ID
column2= P_CLIENT_D
SET IDENTITY_INSERT PIM1 ON
INSERT INTO PIM1 (P_CLIENT_ID)
SELECT
Client.ID
FROMP_Client
So I am trying to insert both an identity values and a value from an other table while leaving the other columns blank. How do I go about doing this.
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Jul 22, 2015
So I have been trying to get mySQL query to work for a large database that I have. I have (lets say) two tables Table_One and Table_Two. Table_One has three columns: Type, Animal and TestID and Table_Two has 2 columns Test_Name and Test_ID. Example with values is below:
**TABLE_ONE**
Type Animal TestID
-----------------------------------------
Mammal Goat 1
Fish Cod 1
Bird Chicken 1
Reptile Snake 1
Bird Crow 2
Mammal Cow 2
Bird Ostrich 3
**Table_Two**
Test_name TestID
-------------------------
Test_1 1
Test_1 1
Test_1 1
Test_1 1
Test_2 2
Test_2 2
Test_3 3
In Table_One all types come under one column and the values of all Types (Mammal, Fish, Bird, Reptile) come under another column (Animals). Table_One and Two can be linked by Test_ID
I am trying to create a table such as shown below:
Test_Name Bird Reptile Mammal Fish
-----------------------------------------------------------------
Test_1 Chicken Snake Goat Cod
Test_2 Crow Cow
Test_3 Ostrich
This should be my final table. The approach I am currently using is to make multiple instances of Table_One and using joins to form this final table. So the column Bird, Reptile, Mammal and Fish all come from a different copy of Table_one.
For e.g
Select
Test_Name AS 'Test_Name',
Table_Bird.Animal AS 'Birds',
Table_Mammal.Animal AS 'Mammal',
Table_Reptile.Animal AS 'Reptile,
Table_Fish.Animal AS 'Fish'
From Table_One
[Code] .....
The problem with this query is it only works when all entries for Birds, Mammals, Reptiles and Fish have some value. If one field is empty as for Test_Two or Test_Three, it doesn't return that record. I used Or instead of And in the WHERE clause but that didn't work as well.
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Apr 28, 2015
I am planning to add some new columns to an existing sql server 2012 table. I know that I need to use the alter statement to accomplish this goal. However my questions is the location of where I want to add the new columns to the table. It would make more sense to add the new columns to the middle of the table since these columns have a similar meaning as other columns in the middle of the table.
However is it better to add these new columns at the end of the table? I am asking this question since I am thinking I might need some sql to move the values of existing columns and values around?
Thus is it better to add new columns to a table in the middle of the table, at the end of the table, or at the end of the table? If so, why one location is better than another location?
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Sep 15, 2015
I have table like below.
filename col1 col2 col3
ABD Y NULL Y
XYZ Y Y Y
CDZ Y Y Y
I Need a output like this
filename col1 col2 col3 Group
ABD Y NULL Y Group1
XYZ Y Y Y Group2
CDZ Y Y Y Group2
I wanted to group the col1 , col2, col3 and group it as same group.
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Oct 6, 2014
I am trying to use a stored procedure to update a column in a sql table using the value from a variable table I getting errors because my syntax is not correct. I think table aliases are not allowed in UPDATE statements.
This is my statement:
UPDATE [dbo].[sessions_teams] stc
SET stc.[Talks] = fmt.found_talks_type
FROM @Find_Missing_Talks fmt
WHERE stc.sessionid IN (SELECT sessionid FROM @Find_Missing_Talks)
AND stc.coupleid IN (SELECT coupleid FROM @Find_Missing_Talks)
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Oct 7, 2015
I am trying to produce a query result that will be using a Case statement to determine values based on scores in a table for each row. The result needs to be exported to be used to upload to a state reporting website. My problem is that the state requires in the CSV file that is uploaded a lot of fields that we do not actually have in the database table we are creating the result set from. After I receive my result set using the Case statement, is there a way to add additional columns that don't actually exist in a table so I can export directly from SQL?
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Apr 28, 2015
I am planning to add some new columns to an existing sql server 2012 table. I know that I need to use the alter statement to accomplish this goal. However my questions is the location of where I want to add the new columns to the table. It would make more sense to add the new columns to the middle of the table since these columns have a similar meaning as other columns in the middle of the table.However is it better to add these new columns at the end of the table? I am asking this question since I am thinking I might need some sql to move the values of existing columns and values around?Thus is it better to add new columns to a table in the middle of the table, at the end of the table, or at the end of the table? If so, can you tell me why one location is better than another location?
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Jul 29, 2015
To avoid locking/blocking, or in transaction scope, we are trying make a common practice of writing coide for update commands in our all SPs based on primary key columns in where clause. I have a following scenario...
UPDATE [dbo].[TL_CST_Locker_Issuance] SET
[isActive] = 0
WHERE
LockerIssuanceId IN (SELECT LockerIssuanceId
[Code] ...
What is the better approach and should be followed to avoid locks and gain performance or best approach.
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Jan 23, 2014
I am trying to pivot table DYNAMICALLY but couldn't get the desired result .
Here is the code to create a table
create table Report
(
deck char(3),
Jib_in float,
rev int,
rev_insight int,
jib_out float,
[Code] .....
Code written so far. this pivots the column deck and jib_in into rows but thats it only TWO ROWS i.e the one i put inside aggregate function under PIVOT function and one i put inside QUOTENAME()
DECLARE @columns NVARCHAR(MAX), @sql NVARCHAR(MAX);
SET @columns = N'';
SELECT @columns += N', p.' + QUOTENAME(deck)
FROM (SELECT p.deck FROM dbo.report AS p
GROUP BY p.deck) AS x;
[Code] ....
I need all the columns to be pivoted and show on the pivoted table. I am very new at dynamic pivot. I tried so many ways to add other columns but no avail!!
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Oct 30, 2014
I have a table (we will cal DateTable) with several (20) columns, each being a date type. Another table's (Project) PK is referenced in the DateTable.
I am trying to write a query that will pull all dates for a specific project from the DateTable if they meet certain criteria(i.e. if the date is <= 7 days from now.
I started with a normal select statement selecting each column with a join to the project and then a where clause using
(DateTable.ColumnName BETWEEN GETDATE() AND DATEADD(day, 7, GETDATE()) OR (DateTable.ColumnName BETWEEN GETDATE() AND DATEADD(day, 7, GETDATE())) ...
The rest of the columns(all with OR between them).
The problem with this is that because I am using OR once one of the dates meets the criteria it selects all the dates that are associated with the project. I ONLY want the dates that meet the criteria and don't care about the rest.
Obviously because I have all the columns in the select statement... So I need something like
Select ALL Columns
from DateTable d
Join Project p
where p.ProjectID = d.ProjectID AND only dates BETWEEN GETDATE() AND DATEADD(day, 7, GETDATE()))
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Oct 11, 2014
I wrote query to update id int(1,1) to some value but its not giving me the result. Is it not possible to update id on the table.
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Apr 4, 2007
Hi,I have an Excel file with 400 rows of old values and the correspondingnew values. My table currently has 10 columns out of which 3 columnsuse the old value specified in the excel file. I need to update thoseold values in the columns with the new values from the Excel file.Please guide me as to how to proceed with this.Thanks in advance!
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Jan 30, 2014
I am trying to insert values in a single table with four columns from 4 different sources. is it possible to run these 4 insertions in parallel. all these insertion are independent of each other
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Oct 22, 2014
I have a table structure where there are multiple "/" separated values in two columns that I need to parse out into single records.
CREATE TABLE CONFIGNEW(PlanID VARCHAR(100), GroupID VARCHAR(6), SubGroupID VARCHAR(255), AddOnCode VARCHAR(2), ExternalCode VARCHAR(20)
INSERT INTO CONFIGNEW(PlanID, GroupID, SubGroupID, ExternalCode) VALUES('101/201', '000005', 'LAA/OCA/UCA/XCA', '1', 'M231_1)
[Code] .....
The results I am looking to achieve are:
PLanIDGroupIDSubGroupIDAddOnCodeExternalCode
101000005LAA1M231_1
101000005OCA2M231_2
101000005UCA3M231_3
101000005XCA4M231_4
201000005LAA1M231_1
201000005OCA2M231_2
201000005UCA3M231_3
201000005XCA4M231_4
Is there an SQL statement that can be used to accomplish this?
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Feb 3, 2015
I have this query:
SELECT TOP (100) PERCENT dbo.Filteredfs_franchise.fs_franchiseid AS FranchiseId, dbo.Filteredfs_franchise.fs_brandidname AS Brand,
dbo.Filteredfs_franchise.fs_franchisetypename AS [Franchise Type], dbo.Filteredfs_franchise.fs_franchisenumber AS [Franchise Number],
dbo.Filteredfs_franchise.fs_transactiontypename AS [Transaction Type], dbo.Filteredfs_franchise.fs_franchisestatusname AS [Status Code],
[Code] ....
I need to pivot this so I can get one row per franchiseID and multiple columns for [Franchisee Name Entity] and [Franchise Name Individual]. Each [Franchisee Name Entity] and [Franchise Name Individual] has associated percentage of ownership.
This has to be dynamic, because each FranchiseID can have anywhere from 1 to 12 respective owners and those can be any combination of of Entity and Individual. Please, see the attached example for Franchise Number 129 (that one would have 6 additional columns because there are 3 Individual owners with 1 respective Percentage of ownership).
The question is how do I PIVOT and preserve the percentage of ownership?
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Jun 21, 2014
my table payment_details structure is
payment_id payment_code
1 null
2 null
3 null
4 null
here payment_id is a primary key and i need to update the whole payment_id column to payment_code column.so i just tried the below query
update payment_details
set payment_code = payment_no
where payment_code is null
but it shows subquery error?
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Nov 7, 2014
To see where is the problem I am trying to count rows in the database.First I create a table A with 2 columns namely tablename, rowbefore and rowafter and I insert records in it as below.
INSERT INTO A
SELECT TableName = o.name, '', Rows = max(i.rows) FROM sysobjects o
INNER JOIN sysindexes i ON o.id = i.id
WHERE xtype = 'u' AND OBJECTPROPERTY(o.id,N'IsUserTable') = 1
GROUP BY o.name
ORDER BY o.name
Then I update rowbefore with rowafter as below.
UPDATE A SET rowbefore = rowafter
Now I launch my application with update records in the database.Then I am trying to update rowafter with new records as below.
UPDATE A
SET rowafter = (SELECT max(sysindexes.rows) FROM sysobjects
INNER JOIN sysindexes ON sysobjects.id = sysindexes.id
WHERE xtype = 'u' AND OBJECTPROPERTY(sysobjects.id,N'IsUserTable') = 1 AND A.tablename = sysobjects.name)
Does this update really update my column rowafter or not?
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Sep 21, 2015
I have some stored procedures that do updates using table aliases, like this:
UPDATE TableAlias
SET ColVal = 1
FROM RealTable AS TableAlias
WHERE TableAlias.ColVal <> 1
This allows me to include joins and stuff in the update (not shown) and make it all more readable for me.
It all works fine, and the SSMS parser says it's fine. But I also have another script which looks at sys.sql_expression_dependencies and sys.objects to find stored procedures with invalid object references (see below), and it's understandably saying that all of the above type stored procedures have invalid references.
SELECT
OBJECT_NAME(DEP.referencing_id) AS referencing_name,
DEP.referenced_entity_name
FROM sys.sql_expression_dependencies AS DEP
WHERE
-- Only validate local references:
(
DEP.referenced_database_name = DB_NAME()
[Code] ....
So I have a couple questions.
1. Is the UPDATE syntax I'm using kosher?
2. Can you recommend any updates to my stored procedure validation script that will better accommodate table aliases like mine?
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Jul 31, 2015
I have a table #vert where I have value column. This data needs to be updated into two channel columns in #hori table based on channel number in #vert table.
CREATE TABLE #Vert (FILTER VARCHAR(3), CHANNEL TINYINT, VALUE TINYINT)
INSERT #Vert Values('ABC', 1, 22),('ABC', 2, 32),('BBC', 1, 12),('BBC', 2, 23),('CAB', 1, 33),('CAB', 2, 44) -- COMBINATION OF FILTER AND CHANNEL IS UNIQUE
CREATE TABLE #Hori (FILTER VARCHAR(3), CHANNEL1 TINYINT, CHANNEL2 TINYINT)
INSERT #Hori Values ('ABC', NULL, NULL),('BBC', NULL, NULL),('CAB', NULL, NULL) -- FILTER IS UNIQUE IN #HORI TABLE
One way to achieve this is to write two update statements. After update, the output you see is my desired output
UPDATE H
SET CHANNEL1= VALUE
FROM #Hori H JOIN #Vert V ON V.FILTER=H.FILTER
WHERE V.CHANNEL=1 -- updates only channel1
UPDATE H
SET CHANNEL2= VALUE
FROM #Hori H JOIN #Vert V ON V.FILTER=H.FILTER
WHERE V.CHANNEL=2 -- updates only channel2
SELECT * FROM #Hori -- this is desired output
my channels number grows in #vert table like 1,2,3,4...and so Channel3, Channel4....so on in #hori table. So I cannot keep writing too many update statements. One other way is to pivot #vert table and do single update into #hori table.
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Jan 29, 2014
I'm fairly new to SQL and am just setting up a Windows 8 app using an Azure SQL server. The issue I have is looking up a part number supersession and getting the latest number. One part number can have multiple supersessions (ie RTC5756 > STC8572 > STC3765 > STC9150 > STC9191 > SFP500160 ).The data I am supplied monthly has both the superseeded items and the supersession information in both columns and is not easy to decipher - for example:
Supersessions Table
----------------------
RTC5756 | STC9191
SFP500160 | STC9191
STC9191 | STC2951
STC3765 | STC9191
STC8572 | STC9191
STC9150 | STC9191
[code]...
The newest part number is kept in a separate table - called "source" - which in this instance is SFP500160. I need access to the latest part number but also to the part's previous numbers, due to the fact that some people may still be stocking them as an old part number and for them to search by. Is there an easy and efficient way of doing both a lookup for the supersessions and a join on the two tables to minimize the queries on the database?
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Apr 3, 2014
I want to update one table with the value from variable using a set based approach.
so the line
>> select @List = coalesce(@list + ',','') + cast(id as varchar(10)) + cast(feetype as varchar(25))
works fine but I want to take @list and use it to update my customers table. here is the full code.
create table customers
(custid int, fee_history varchar(max))
insert into customers
(custid
, fee_history
[code]....
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May 29, 2014
I am writing a query to update table variable. It is throwing me some error.
I have a table variable declared and inserted the data with three columns. I want to update col1 of that table variable when the second column of that table variable= one column from a physical table
update @MYtabvar set @Mytabvar.LatestDate=B.LatestDate from TableB B where @Mytabvar.id=B.ID
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Jun 14, 2006
Hi ,I need to place the results of two different queries in the same resulttable parallel to each other.So if the result of the first query is1 122 343 45and the second query is1 342 443 98the results should be displayed as1 12 342 34 443 45 98If a union is done for both the queries , we get the results in rows.How can the above be done.Thanks in advance,vivekian
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Oct 26, 2015
Say you have a fact table with a few columns that all reference the same key column in a dimension table, you want to write a view to return the information for those keys?
USE MyTestDB;
GO
SET NOCOUNT ON;
IF OBJECT_ID ('dbo.FactTemp' ,'U') IS NOT NULL
DROP TABLE dbo.FactTemp;
[Code] ....
I'm using very small data at the moment, and the query plan and statistics don't really say which way.
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May 13, 2015
I am relatively new to complex queries and need creating a query using a CASE in order to update columns to be either A or B. A few things about this is that I am joining tables from linked servers as well. This is the last part. I execute the query and receive the error:
Incorrect syntax near the keyword 'from'.
select (select FirstName from [ZZZXXX].HCM.dbo.tPerson where PersonGUID = tPersonJobHistAlias.SupervisorPersonGUID) as supervisorFirstName,
(select LastName from [ZZZXXX].HCM.dbo.tPerson where PersonGUID = tPersonJobHistAlias.SupervisorPersonGUID) as supervisorLastName,
(select PersonID from [ZZZXXX].HCM.dbo.tPerson where PersonGUID = tPersonJobHistAlias.SupervisorPersonGUID) as SupervisorEmployeeID,
[Code] .....
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Dec 26, 2013
In a stored procedure I dynamically create a temp table by selecting the name of Applications from a regular table. Then I add a date column and add the last 12 months. See attachment.
So far so good. Now I want to update the data in columns by querying another regular table. Normally it would be something like:
UPDATE ##TempTable
SET [columName] = (SELECT SUM(columName)
FROM RegularTable
WHERE FORMAT(RegularTable.Date,'MM/yyyy') = FORMAT(##TempMonths.x,'MM/yyyy'))
However, since I don't know what the name of the columns are at any given time, I need to do this dynamically.
how can I get the column names of a Temp table dynamically while doing an Update?
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Mar 28, 2015
Our system runs a SQL Server 2012 DB, it has a table (table_a) which has over 10M records. Our system have to receive data file from previous system daily which contains approximate 3M updated or new records for table_a. My job is to update table_a with the new data.
The initial solution is:
1 Create a table (table_b) which structur is as the same as table_a
2 Use BCP to import updated records into table_b
3 Remove outdated data in table_a:
delete from table_a inner join table_b on table_a.key_fileds = table_b.key_fields
4 Append updated or new data into table_a:
insert into table_a select * from table_b
As the test result, this solution is very inefficient. Step 3 costs several hours, e.g. How can I improve it?
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Oct 20, 2014
I have a stored proc that contains an update which utilizes a case statement to populate values in a particular column in a table, based on values found in other columns within the same table. The existing update looks like this (object names and values have been changed to protect the innocent):
UPDATE dbo.target_table
set target_column =
case
when source_column_1= 'ABC'then 'XYZ'
when source_column_2= '123'then 'PDQ'
[Code] ....
The powers that be would like to replace this case statement with some sort of table-driven structure, so that the mapping rules defined above can be maintained in the database by the business owner, rather than having it embedded in code and thus requiring developer intervention to perform changes/additions to the rules.
The rules defined in the case statement are in a pre-defined sequence which reflects the order of precedence in which the rules are to be applied (in other words, if a matching value in source_column_1 is found, this trumps a conflicting matching value in source_column_2, etc). A case statement handles this nicely, of course, because the case statement will stop when it finds the first "hit" amongst the WHEN clauses, testing each in the order in which they are coded in the proc logic.
What I'm struggling with is how to replicate this using a lookup table of some sort and joins from the target table to the lookup to replace the above case statement. I'm thinking that I would need a lookup table that has column name/value pairings, with a sequence number on each row that designates the row's placement in the precedence hierarchy. I'd then join to the lookup table somehow based on column names and values and return the match with the lowest sequence number, or something to that effect.
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