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循环查询结果与在Postgres中明确声明的游标循环之间有什么区别?循环查询结果隐式创建游标?循环查询结果与在Postgres中循环显式声明的游标
循环执行的查询结果:
FOR v_employee IN
SELECT *
FROM employee
WHERE ...
LOOP
-- Do something with v_employee
END LOOP;
循环执行明确宣布光标:
FOR v_employee IN my_cursor
LOOP
-- Do something with v_employee
END LOOP;