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Unanswered: Need Help Writing Sql Now
I have to find the number of orders sent to two different postal codes but to get all of the right columns, I have to use 2 different tables.
So, I used WHERE to connect the two tables with the primary keys, but where do I use the specific criteria for the exact postal codes?
We tend to connect tables using JOIN syntax
Of course you can connect tables using the WHERE clause but this is a preferred method.
ON table_2.join_field = table_1.join_field
Either way you just need to add or extend your WHERE clause e.g.
P.S. In the future you should provide more details in your question
WHERE table_1.field_1 = 'value'
AND table_2.field_2 = 'another value'