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Now, Here I want to make some changes in third and fourth row, to complete this action, I execute UPDATE command with INNER JOIN. You can see how Third and Fourth records of table schoolold easily replaced with table schoolnew by using INNER JOIN with UPDATE statement.
We could use separate statements, but it’s easier to maintain using a single statement.This will result in the active column for some products set to Y and others set to N: It is possible to use a subquery in the WHERE clause as well.Just like in the previous examples, this can be done to remove the separate step of finding a value to be updated and then to run the query to update it. The WHERE clause specifies which record(s) that should be updated.If your select statement returns multiple values, your variable is assigned the last value that is returned.