该查询块的检索结果会被oracle 保存在用户的临时表空间中,该命名块就像虚表或者内联视图一样。 语法 代码语言:javascript 代码运行次数:0 运行 AI代码解释 WITH subquery_name AS (the aggregation SQL statement) SELECT (query naming subquery_name); With查询语句不是以select开始的,而是以“WITH”关键字开头。
The SQL-99 “WITH clause” is very confusing at first because the SQL statement does not begin with the word SELECT. Instead, we use the “WITH clause” to start our SQL query, defining the aggregations, which can then be named in the main query as if they were “real” tables: WITH...
使用WITH STATEMENT在Oracle中创建日历函数您可能应该只使用初始查询。但是，如果确实需要函数，则可以使用管...
http://stackoverflow.com/questions/5380559/update-statement-using-with-clause
Oracle 12c中的with子句增强 1. 设置 创建测试表。 DROP TABLE test PURGE; CREATE TABLE test AS SELECT 1 AS id FROM dual CONNECT BY level <= 1000000; 2. WITH子句中的函数 WITH子句声明部分可用来定义函数,如下所示。 WITH FUNCTION with_function(p_id IN NUMBER) RETURN NUMBER IS ...
How must astart with ... connect byselect statement be read and interpreted? If Oracle encounters such an SQL statement, it proceeds as described in the following pseude code. for rec in (select * from some_table) loop if FULLFILLS_START_WITH_CONDITION(rec) then ...
Highlight the SQL statement in the HR_ORCL SQL Worksheet that you executed, right-click and select Create Report...2 . Enter the name RELATIVE_ID greater than 110 into the Name field. Optionally, you can add a Description and a Tooltip. Click Apply. 3...
How does this work in Oracle? The answer is pretty straightforward: in Oracle this syntax of UPDATE statement with a JOIN is not supported. We must do some shortcuts in order to do something similar. We can make use of a subquery and an IN filter. For example, we can transform th...
The INSERT statement in SQL Server is versatile. It now allows the insertion of multiple rows of literal values. It also provides the output clause that solves a number of common problems such as ascertaining the value of identity fields, and other calcu
FromOracle Database 23ai, theautomatic SQL transpilercan extract SQL expressions in PL/SQL. These are then part of the SQL statement, so at runtime it's as-if the function doesn't exist! To do this, ensure thesql_transpilerparameter ison(it'soffby default). When a function in thewhere...