在mysql视图上增加一列

-- 假设基础表为 `base_table`
ALTER TABLE base_table ADD COLUMN new_column datatype;

-- 更新视图以包含新列
CREATE OR REPLACE VIEW view_name AS
SELECT column1, column2, ..., new_column
FROM base_table;

CREATE VIEW new_view_name AS
SELECT column1, column2, ..., (SELECT new_column FROM base_table WHERE base_table.id = your_table.id) AS new_column
FROM your_table;

CREATE OR REPLACE VIEW view_name AS
SELECT t1.column1, t1.column2, ..., t2.new_column
FROM table1 t1
JOIN table2 t2 ON t1.id = t2.id;