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23 wrz 2012 · The SQL WITH clause was introduced by Oracle in the Oracle 9i release 2 database. The SQL WITH clause allows you to give a sub-query block a name (a process also called sub-query refactoring), which can be referenced in several places within the main SQL query.
The WITH clause, or subquery factoring clause, is part of the SQL-99 standard and was added into the Oracle SQL syntax in Oracle 9.2. The WITH clause may be processed as an inline view or resolved as a temporary table.
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.
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. NATURAL JOIN uses all the columns with matching names and datatypes to join the tables.
19 lis 2018 · With Clause in Oracle is released in Oracle 9i release 2 to improve the performance of complex sql queries. The clause works like a global temporary tables of oracle which is used to improve the query speed of complex sql queries.
WITH Clause Enhancements in Oracle Database 12c Release 1 (12.1) In addition to the Subquery Factoring Clause, Oracle 12c includes a PL/SQL declaration section in the WITH clause. Setup. Functions in the WITH Clause. Procedures in the WITH Clause.
refer to the WITH clause as a CTE or "Common Table Expression", however that is typically a term used by other database vendors. In Oracle this is better known as the "Subquery Factoring clause" and you'll find it in the documentation, quite logically when you consider it, under the SQL SELECT syntax (as that is where it gets used):
