Questions tagged [merge]

A SQL statement that can conditionally insert, update, or delete target rows.

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57 views

Can I simplify this MERGE statement w.r.t. WHEN MATCHED conditions?

I'm using SQL Server (SQL Server 2016 and Azure SQL) and I have this MERGE statement which uses a rather gnarly WHEN MATCHED condition to only update rows where values are actually different. This is ...
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34 views

T-SQL Merge not updating in explicit transaction

We have the following code in a stored procedure which has a merge statement and an update statement to a different table in an explicit transaction. The merge update does not update any data in the ...
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1answer
36 views

JOIN/Union Two tables, removing NULL where possible (similar to pandas concatenate)

I am wondering how to perform an operation that I guess is most akin to a concatenate if you're familiar with pandas. Basically, what I want to do seems like a UNION where records are "collapsed" in ...
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1answer
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Can I MERGE INTO … INSERT with a column list in Hive?

Here's a good example of a MERGE statement: MERGE INTO target AS T USING source AS S ON T.ID = S.ID and T.tran_time = S.tran_time WHEN MATCHED UPDATE SET quantity = S.quantity WHEN MATCHED AND S....
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1answer
33 views

SQL: Merge rows when value doesnt change in continuous time

I am new to SQL and I need to summarize a table that has this information: Serial Number, StartDate, EndDate, StatusID and TimeInState, what I need is to merge rows that keep the same StatusId during ...
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2answers
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It's possible to skip duplicate keys (i.e. MERGE) in a BULK INSERT in MySQL?

I have a INSERT...SELECT statement that I want to run several times from TABLE1 to TABLE2 as the data in TABLE1 will change overtime. I don't expect the past data from select to change overtime, the ...
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24 views

Using Merge in Oracle to update a table and clear out a field if the record is not in the source table

I need some help converting an MSSQL Merge statement into Oracle MERGE INTO A USING B on a.a_id = b.b_id WHEN MATCHED and isNull(a.a_field, '') <> isNull(b.b_field,'') THEN UPDATE SET a....
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Integrating Flyway and Github [closed]

I was wondering if any of you can share some experience regarding integrating Flyway and Git. We're currently developing a project, each sprint we need to make database changes for new features of ...
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1answer
16 views

Merging table records across TabName for each PersonID

Consider the following table, CREATE TABLE temp ( [TabName] VARCHAR(255), [PersonID] VARCHAR(255), [FirstName] VARCHAR(255), [Gender] VARCHAR(255), [BenefitType] VARCHAR(255), ...
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2answers
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Failing MERGE Statement: How to monitor with XEvents and specifically get parameter values for a prepared statement?

My problem I am running SQL Server 2017 and would like to investigate an error with a MERGE statement like the following MERGE INTO table USING (SELECT ? AS Search_Col) AS SRC ON table....
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1answer
60 views

Will a MERGE between two tables ever be faster than a DROP and SELECT INTO on the second table?

Is there a scenario where it's faster for synchronizing the data from TableA to TableB by using a MERGE query as opposed to dropping TableB and doing a SELECT * INTO TableB FROM TableA?
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1answer
69 views

Concatenate a string value from table A to a text field in table B, in a scalable way

On a daily basis, I am adding values from the following table (table1): Id Name Value 1 'Name 1' 789 2 'Name 2' 789 3 'Name 3' 789 To the text field (Values) in the following ...
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1answer
18 views

how to approach user acceptance testing for merged constituent records in a CRM system?

I've been Googling to read up and understand what UATs are and how to conduct them, but I'm not quite understanding how to apply it in this scenario. My acceptance criteria would be that all ...
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17 views

Merge replication repeatedly applies snapshot to subscribers

We recently moved our 2008 R2 database to a 2016 server. The compatability level was changed to 2016 on the publisher which is also the distributor. The server uses a merge replication to laptop ...
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1answer
122 views

Microsoft SQL Server MERGE deadlock issue

I am using Microsoft SQL Server version: Microsoft SQL Server 2016 (RTM) - 13.0.1601.5 (X64) Apr 29 2016 23:23:58 Copyright (c) Microsoft Corporation Enterprise Edition (64-bit) on Windows ...
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2answers
224 views

Ms sql MERGE INTO locks whole table for updates

I have a table for statistic values, it holds millions of records, which is defined like this: CREATE TABLE [dbo].[Statistic] ( [Id] [INT] IDENTITY(1, 1) NOT NULL , [EntityId] [INT] NULL , [...
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2answers
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Better ways to update columns of a table than using Merge Statement

I have a table with this structure Table1(Cust_No Varchar2(50), First_Name Varchar2(50), Last_Name Varchar2(50), Error_Code Number(1) , Error_Desc Varchar2(50)) ...
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1answer
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SQL Server - MERGE duplicate SOURCE rows validation is only evaluated on UPDATE and DELETE clauses

I want SQL Server to throw an error at me if my SOURCE table contains duplicates as per the ON clause in every case, including INSERT, but it only does for the UPDATE and DELETE cases. Why doesn't it? ...
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1answer
103 views

SQL Server - Identical query on near identical database takes 20 seconds on sql2012 but does not complete after 50+ hours on sql2014

I have 2 databases that contain nearly identical data. The first has compatibility level 100 and is restored on a sql2012 instance. The second has compatibility level 110 and is restored on a sql2014 ...
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1answer
66 views

T-SQL query to merge all rows into one row [duplicate]

I have a T-SQL query, which pulls details from several locations (Something like below): IF OBJECT_ID('tempdb..#mytable') IS NOT NULL DROP TABLE #mytable; CREATE table #mytable ([Locno] varchar(...
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How to capture 'Deleted' and 'Updated' record after Merge in PL/SQL.TSQL 'Output' equivalent in PL/SQL

hope you're doing well. imagine I have a source and destination table like: Source(Column1 int , column2 varchar2(50)) Destination (Column1 int , column2 varchar2(50)) I want to merge these two ...
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SQL Server 2017 Merge Not Running Triggers

Everywhere I am reading, when a merge statement happens, it will fire the triggers (INSERT, UPDATE, DELETE) in no particular order. I have a basic merge: MERGE dbo.Users WITH(HOLDLOCK) as tgt USING #...
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1answer
122 views

SSIS Merge Join: Delete does not work

I've set up a Data Flow Task to sync a flat file with its destination table using a Merge Join with a Left Outer Join as described here (and elsewhere). Merge Join: Inserting and Updating works fine,...
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Filtered Merge Statement [duplicate]

This is, probably, a really simple answer, but I am not coming up with it... Any help would be greatly appreciated: I created a web form, to a stored procedure, that submits userID, deptID, and a ...
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1answer
234 views

LEFT OUTER JOIN fails to find matching row

This one has me about beat. The following is code within a stored procedure that, if run repeatedly, continues to 1) fail to identify a matching row and 2)insert a new identical row. The values and ...
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1answer
166 views

Merge/Intersection between table and dataset - How to achieve?

Consider the following table: Id Hash ----------- ---------------------------------- 1 0x31F777F0804D301936411E3ECD760859 2 0xD64A593F3E9ACC972158D522A4289EA0 (Id is an ...
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1answer
59 views

Using a DB2 merge with conditionals for matches?

Within a PHP script I'm running a working merge but I need to add date conditionals to it, and my updates cause it to no longer work. The logic I'm looking for is this: If there's a match AND the ...
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1answer
567 views

WHEN MATCHED clause fails if there's a NULL in the ON columns [duplicate]

I'm using a query with merge that works fine if all columns in the ON clause have a value but WHEN MATCHED omits if there's a NULL mark in one of the columns: MERGE PEPS AS peps USING (Lots of Cols.. ...
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1answer
727 views

Is using multiple unique constrains on a single table considered bad design?

I was looking at PostgreSQL's INSERT INTO .. ON CONFLICT (..) DO UPDATE .. syntax and realized, you cannot do multiple unique constraint checks with it. I mean, you either refer to a composite unique ...
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3answers
1k views

Does MERGE prevent deadlocks and server blocking?

I have started looking at MERGE as an option that I would use in my application to process UPSERT transactions. Seems that a lot of SQL Server experts are recommending this approach. However, while ...
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3answers
6k views

Insert Values Into Table, Putting Duplicates In Another Table

So I posted this question yesterday. Some of the responses I got were helpful, however it seems my issue is a bit more complex than I originally thought. After doing some looking the reason I was ...
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2answers
894 views

Help With Merge Statement

I am wanting to compare the Distinct sn from HMI_Temp to sn in my table HMI -> if the sn exists, I want to update the values - got this syntax CHECK! - if the sn does NOT exist, I want to insert the ...
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0answers
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Is it possible to use target column value on insert in SQL Server merge 'not matched' block?

When working with a MERGE statement in SQL Server to use the updated state of a temp table to later modify records across multiple tables in a db schema, I am running in an issue when executing the ...
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1answer
4k views

How can I merge data from an Excel file into an access database with multiple tables? [closed]

I have an access database with many internal tables. Each table is a category of electronic components (resistor, capacitor etc) In all tables, there is a manufacturer part number and a currently ...
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1answer
586 views

Breaking up insert statements with GO [closed]

I'm trying to build off of this answer How do I run a large script with many inserts without running out of memory? and break up a query into smaller ones with BEGIN TRANSACTION and then GO's ...
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1answer
2k views

Merge data with UNION ALL and INNER JOIN in MySQL

I try merge a data to one row. I have query: (select t.`id`, t.`coins_id`, t.`first_coin`, t.`second_coin`, t.`price` as `price_old`, null as `price_young`...
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1answer
5k views

Difference between UPSERT and MERGE?

From the PostgreSQL wiki, MERGE is typically used to merge two tables, and was introduced in the 2003 SQL standard. The REPLACE statement (a MySQL extension) or UPSERT sequence attempts an UPDATE, ...
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2answers
61 views

Merging table output into a column in another table

I have an interesting problem to work in SQL that I really need help with. What I need to do is to take a table, count the number of repeats/duplicates in a column, add those up and then spit the ...
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1answer
19 views

Merging output in table by matching records

I have an interesting problem to work in SQL that I really needenter code here help with. What I need to do is to take a table, count the number of repeats/duplicates in a column, add those up and ...
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2answers
55 views

Schema Changes Are Not Populating to The Subscribers

One of my publications was dropped mistakenly. I restored it from the latest backup but now schema changes are not replicated to the subscribers. What can I do to re-initialize/fix the publication?
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2answers
519 views

How can I get identity-like values in a MERGE INSERT statement

I would like to merge a table bar into another table foo, and while doing so I have to assign a unique value to a column messagenr. This is my attempt to do so (sql-server): MERGE foo AS target ...
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1answer
49 views

Is updating many columns in a MERGE statement bad for performance?

I have a merge statement that either needs to insert about 65 rows worth of data, or update rows. At the moment I'm updating all columns when a match is found. But I don't need to. Would there be a ...
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2answers
349 views

“Query processor ran out of internal resources and could not produce a query plan” for MERGE with 2,600 records and one key field!

I'm writing a Visual Studio SQL database project for an existing database. I'm generating simple merge scripts per table for standing data, existing data so on and so forth. It's been relatively ...
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1answer
14k views

SQL Server : Merge and update multiple rows across columns

I am trying to consolidate data in one table and merge it into another. The data in the source destination table is as follows : name |dob |city |occupation --...
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1answer
3k views

SQL Server - MERGE join condition with NULLable Columns

I am trying to merge two of my tables (identical definition). MERGE INTO xx.dbo.acc_s AS Target USING yy.dbo.acc_s AS Source ON (Target.acc_id= Source.acc_id AND Target.s_id= Source.s_id AND ...
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888 views

Merge saying duplicate rows, but can't find any

When I run the following: merge into LIBRARYA.TABLEA mergeTarget using LIBRARYB.TABLEB mergeUsing on mergeTarget.COLA1 = mergeUsing.COLB1 and mergeTarget.COLA2 = mergeUsing.COLB2 when ...
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1answer
4k views

MERGE deadlocking prevention

In one of our databases we have a table that is intensively concurrently accessed by multiple threads. Threads do update or insert rows via MERGE. There are also threads that delete rows on occasion, ...
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0answers
384 views

How to find MariaDb/Mysql structure differences

I have two similar databases with many tables, in one of these there was some alter commands maybe changing data types or adding some columns. Exists a free analyzer/merging tool to check their ...
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2answers
6k views

MySQL merge two tables of different database to single database [closed]

Friends, i have database named as DB1 with a table called TB1A and another database as DB2 with a table TB2A. TB1A having 5 columns and TB2A having 8 columns, All the columns available in TB1A is ...
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2answers
5k views

Linked Server : Syncing two tables on two SQL Servers

Suppose these database structure : --On main server(server) TicketRequest (id, date, count, start, end/*,and some other columns*/) Ticket (id, reqId, blockedDate, usedDate, userId/*,and some other ...