This can be used to match data from to related tables into one result. SELECT * FROM surveys, species WHERE surveys.species_id = species.species_id; The query above selects and merges rows from both ...
Key points: INNER JOIN → returns rows with matching values in both tables LEFT JOIN → returns all rows from the left table and matched rows from the right table RIGHT JOIN → returns all rows from the ...
Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...
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