Describe the types of outer joins
There are actually three types of outer joins. In a left outer join, all rows from the table on the left (the table listed first in the query) will be included regardless of whether they match rows from the table on the right (the table listed second in the query). Rows from the table on the right will be included only if they match. In a right outer join, all rows from the table on the right will be included regardless of whether they match rows from the table on the left. Rows from the table on the left will be included only if they match. In a full outer join, all rows from both tables will be included regardless of whether they match rows from the other table.
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