JOIN operations

The JOIN operations perform joins between two tables.

The JOIN operations are among the possible tableExpressions in a FROM clause. (You can also perform a join between two tables using an explicit equality test in a WHERE clause, such as WHERE t1.col1 = t2.col2.)

The JOIN operations are:

In all cases, you can specify additional restrictions on one or both of the tables being joined in outer join clauses or in the WHERE clause.

JOIN expressions and query optimization

For information on which types of joins are optimized, see Tuning Derby.

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Data types
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Capitalization and special characters
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