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mysqlsql-servert-sql

Does SQL Server Offer Anything Like MySQL's ON DUPLICATE KEY UPDATE

In MySQL, if you specify ON DUPLICATE KEY UPDATE and a row is inserted that would cause a duplicate value in a UNIQUE index or PRIMARY KEY, an UPDATE of the old row is performed. For example, if column a is declared as UNIQUE and contains the value 1, the following two statements have identical effect: 

INSERT INTO table (a,b,c) VALUES (1,2,3)
  ON DUPLICATE KEY UPDATE c=c+1;

UPDATE table SET c=c+1 WHERE a=1;

I don't believe I've come across anything of the like in T-SQL. Does SQL Server offer anything comparable to MySQL's ON DUPLICATE KEY UPDATE?

Solution

  • There's no DUPLICATE KEY UPDATE equivalent, but MERGE and WHEN MATCHED might work for you

    Inserting, Updating, and Deleting Data by Using MERGE