A SQL statement typically used to `UPDATE` records when they exist and `INSERT` them when they do not.

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Does MERGE updates when not needed?

In SQL Server 2012, Does a merge statement like this : WHEN MATCHED THEN update SET A.len = B.len updates a row even if A.len equals to B.len ? Or does the SQL SERVER knows to ignore this ...
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90 views

MySQL: Merge Same Database on Several Location into Single Location

I have registration form, which exactly same for several location. Each of them has REG column, which this field is unique for each row. Basically each data input have different REG number for it, ...
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45 views

Merge two rows into one row

So I have a table that looks like this: And here's my query for that table: select b.Barcode,a.ItemCode,b.Color,b.Size,b.Class,d.Locationcode,c.price, SUM(case when e.description = 'Selling ...
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MSSQL 2000 replication, incrementing an integer column on a single row using an update statement

I have 2 web servers, both of which connect to separate mssql 2000 database servers, these two servers use merge replication in order to collate tracking data. Now each web server runs an update ...
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Once in a while synchronization of the independently updated mysql databases problem

I have a production database and a test database running on MySQL with MyISAM and InnoDB tables, which are updated independently. The Production database is updated by system and sometimes by a user. ...
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Executing shell commands from SSDT Post Deploy scripts to generate SQL

tl;dr: I'm looking for the equivilant of !! sqlcmd -S $(Server) -o foo.sql -d $database -Q "EXEC sp_generate_merge 'table_name'" in a SSDT post deploy script, but !! doesn't seem to be supported. I ...
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90 views

RETURNING syntax with multiple columns

Again, another question related to the answer of the one there: Insert with OUTPUT correlated to sub query table So I ended up with this query, written for SQL Server: CREATE TABLE tempIDs ( ...
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73 views

How to merge rows based on how much data they have?

I am cleaning data and I formed a table something like this: file | product | color | product_id --------------------------------------------- one.csv pipe blue null ...
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What overhead is there if I MERGE row by row?

I have a target table of about 2000 rows and I want to be able to MERGE (with HOLDLOCK) about 5-10 rows at a time into the target table. The target table doesn't get used heavily, with only 1-2 users ...
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What is “Set the merge agent on the problem subscribers to use the slow link agent profile”

I have never used Merge Replication Feature of the sql server before, so What does "Set the merge agent on the problem subscribers to use the slow link agent profile" mean? Background info: "Merge ...
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38 views

Oracle 12G Merge subpartition data into partition

I have a Oracle 12G table which is interval partitioned (monthly) and list sub-partitioned. There is no longer a requirement to sub-partition the table and hence I would like to "merge" the data in ...
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How to merge exported SQL Data into restored DB updating only changed rows?

We've just moved two databases from Microsoft SQL Server 2008 instance to another using BACKUP DATABASE on the original system and then RESTORE DATABASE on the new one. Everything went fine but then I ...
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merge in cursor is slow ,any alternative for that in oracle 11g

we have a requirement like below. we need to update one table A from another table B based on joining criteria. both tables are having porper joining columns. Table A has 2 columns missing_order_cw ...
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406 views

The OLE DB provider “SQLNCLI10” for linked server “(null)” indicates that either the object has no columns or

When I run the following script its run fine merge RDW_RRR_MAIN_ST.dbo.tmps AS dest USING (select * from RDW_RRR_MAIN_ST.dbo.tmprole cross join RDW_RRR_MAIN_ST.dbo.tmpscreen) as src1 on ...
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232 views

Multiple table rows in one row Informix

I have problem just like this one but in Informix. I have table with 2 attributes ID, email like this one: ID email 1 my_mail1@mail.com 2 my_mail2@mail.com 2 my_mail3@mail.com 2 ...
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107 views

Merge Similar Schema from one MySQL DB to Another

I have two databases (db1 and db2). db2 has all tables from db1 but not necessarily the same columns. I want to move any missing columns in db2 from tables in db1 but keep the rest unchanged. ...
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1k views

Oracle merge query vs correlated update

I have a query which updates a table with data from another table. The current query is written as a correlated update with an exists clause to remove unnecessary rows. The problem is since both of ...