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  • Obtaining rowcounts when using Composable DML [T-SQL]

    In my August 2009 blog post Exploring Composable DML I introduced a new feature in SQL Server 2008 called Composable DML and also outlined one of its limitations; namely that data from the OUTPUT cannot be aggregated prior to insertion. Composable DML does have some useful scenarios however and one of those is in capturing and storing values that ...
    Posted to Jamie Thomson (Weblog) by jamiet on February 7, 2013
  • MERGE and OUTPUT – the swiss army knife of T-SQL

    The new T-SQL MERGE statement in SQL Server 2008 seems to be finding many uses over and above its de facto UPSERT usage scenario, probably the most popular of which is its ability to update one table from another in an ANSI-compliant manner as detailed expertly by Hugo Kornelius in his blog post Let's deprecate UPDATE FROM! Today I stumbled upon ...
    Posted to Jamie Thomson (Weblog) by jamiet on January 6, 2010
  • Extracting insert, update, delete rowcounts from T-SQL MERGE

    Just lately I’ve been using T-SQL’s MERGE statement (introduced in SQL Server 2008) and one thing that I needed to do was extract rowcounts for each DML operation (i.e. INSERT, UPDATE, DELETE) conducted by a MERGE. I was surprised to find that while @@ROWCOUNT is supported for MERGE, it only returns the total number of affected rows and there are ...
    Posted to Jamie Thomson (Weblog) by jamiet on August 29, 2009
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