<ul><li>Joining tables in SQL with composite keys requires careful consideration to match rows based on multiple columns that uniquely identify records.</li><li>Using composite keys like in the Income_o and Outcome_o tables allows for more precise data organization and analysis, essential for understanding income and outcome data together.</li><li>To join tables with composite keys, a FULL OUTER JOIN is employed to combine data based on the point and date columns from both tables.</li><li>The use of COALESCE helps handle NULL values and ensures a complete result set, merging income and outcome information seamlessly for further analysis.</li></ul>

How to Join Two Tables with Composite Keys in SQL?

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