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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.
23 wrz 2012 · 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 name assigned to the sub-query is treated as though it was an inline view or table.
Purpose. Use a SELECT statement or subquery to retrieve data from one or more tables, object tables, views, object views, materialized views, analytic views, or hierarchies.
11 maj 2015 · The WITH clause allows you, as part of your select statement, to assign a name to a subquery and utilise its results by referencing that name. It is, on first glance, quite jarring. Because the subquery factoring clause brutally transforms the look of a query, making it no longer start with the SELECT keyword. 1. 2.
19 lis 2018 · These are some important points of With Clause in oracle. In following section i would like to explain about the syntax as well as multiple examples of with clause. Syntax : With SQL_Query_Name As (SQL query;) Select * from New_SQL_Query_name; Execution of With Clause :
Here’s a breakdown of the WITH clause and how it is typically used: Syntax WITH cte_name (column_name1, column_name2, ...) AS ( SELECT column_name1, column_name2, ... FROM table_name WHERE condition ) SELECT * FROM cte_name; Example
The declaration section of the WITH clause can be used to define PL/SQL functions, as shown below. WITH. FUNCTION with_function(p_id IN NUMBER) RETURN NUMBER IS. BEGIN. RETURN p_id; END; SELECT with_function(id) FROM t1. WHERE rownum = 1. / WITH_FUNCTION(ID)
