Mysql insert on duplicate key update example let’s take a look at an example of using the insert on duplicate key update to understand how it works. first, create a table named devices to store the network devices.. 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, mysql performs an update of the old row. for example, if column a is declared as unique and contains the value 1, the following two statements have similar effect:. When updating summary tables we typically use on duplicate key update, a mysql extension to insert statements since version 4.1, that allows a record to either be inserted or updated in one query. for example, with this table:.
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Insert into tablename(col1, col2) values (’xxx’, ‘yyy’) on duplicate key update col1 = values(col1) note that you don't need to update the primary key part of the row. we know that's the same because there was a collision.. Hi, i am migrating from mysql to sql express. in mysql, i import data from oracle using the "insert into. on duplicate key update". with the "on duplicate key update", when there is a duplicate key in mysql exists, the respective records will be updated (so to avoid inserting the data twice).. I want an sql statement that will insert if a unique key does not exist, and update the record if it does for multiple records. i have attached my sql. on the final line ive just set enq_stats=3 while testing, but in the final version, i want to update with the results from the select query..