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The USING clause specifies which columns to test for equality when two tables are joined. It can be used instead of an ON clause in the JOIN operations that have an explicit join clause.
- SQL Clauses
WHERE CURRENT OF clause; Parent topic: SQL language...
- SQL Clauses
23 kwi 2013 · USING (column) When you are specifying an equijoin of columns that have the same name in both tables, the USING column clause indicates the columns to be used. You can use this clause only if the join columns in both tables have the same name.
21 mar 2018 · USING Clause is used to match only one column when more than one column matches. NATURAL JOIN and USING Clause are mutually exclusive. It should not have a qualifier(table name or Alias) in the referenced columns.
19 sie 2022 · How to create a join with the USING clause in Oracle? Use the USING clause to specify the columns for the equijoin where several columns have the same names but not same data types. Use the USING clause to match only one column when more than one column matches.
This tutorial shows you how to use the Oracle INNER JOIN clause to retrieve data from a table that has matching rows from other tables.
USING is almost a half-way house between a conventional INNER JOIN and a NATURAL JOIN. The join is made using columns with matching names in each table, but you have to specify the columns to be used, not the whole condition. This allows you to join on a subset of the columns common to both tables.
Oracle Database has two syntaxes for joining tables. The proprietary Oracle method. And the ANSI standard way. Oracle syntax joins tables in the where clause. ANSI style has a separate join clause. This tutorial will show both methods. We recommend you use ANSI syntax.
