I need help creating a database query that shows only the records where two specific columns have different values. Let me explain what I’m looking for with an example. Say I have a table with price_expected and price_actual columns. I want my query to return rows only when these values don’t match each other. So if price_expected is 25 and price_actual is 30, that row should appear in my results. But if both columns contain 25, then I don’t want that row included. I’m not sure about the correct syntax to compare two columns in the WHERE clause. Can someone show me how to write this type of comparison query?
hey, for this query, try using: WHERE price_expected <> price_actual. that should work too for your use case. just keep in mind, null values can cause issues so ya might need to check for them with IS NULL if it’s relevant.
To achieve this, you can use the inequality operator in your WHERE clause: WHERE price_expected != price_actual. This will return all records where the values in the two columns are different. However, be aware that this does not account for NULL values, as comparisons involving NULL do not yield true or false. If your data might include NULLs and you want to consider those cases, you will need to modify your query to include conditions for NULL checks with IS NULL and IS NOT NULL.