要創建一個PostgreSQL視圖，可以使用以下語法：
CREATE VIEW view_name AS
SELECT column1, column2, ...
FROM table_name
WHERE condition;
要管理視圖，可以使用以下命令：
SELECT *
FROM information_schema.views
WHERE table_schema = 'public';
CREATE OR REPLACE VIEW view_name AS
SELECT new_column1, new_column2, ...
FROM table_name
WHERE new_condition;
DROP VIEW view_name;
ALTER VIEW view_name OWNER TO new_owner;
通過這些命令，可以輕松地創建和管理PostgreSQL視圖。
