目录CREATE TABLE AS SELECT 语句CREATE TABLE LIKE 语句CREATE TABLE AS TABLE 语句SELECT INTO 语句CREATE TABLE INHERITS 语句PostgreSQL 提供了多种不同的复制表的方法，它们的差异在于是否需要复制表结构或者数
Is it possible (or even advisable) to cast the element retrieved from a for each statement in the statement itself? I do know that each element in list will be of type <SubType>.
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