在SQL中，可以使用以下技巧來進行批量更新操作：
UPDATE table_name
SET column_name =
CASE
WHEN condition1 THEN value1
WHEN condition2 THEN value2
ELSE default_value
END
UPDATE table_name
SET column_name =
(SELECT new_value FROM other_table WHERE condition)
UPDATE table1
SET column_name = table2.new_value
FROM table1
JOIN table2 ON table1.id = table2.id
CREATE TEMPORARY TABLE temp_table AS
SELECT id, new_value FROM table_name WHERE condition;
UPDATE table_name
SET column_name = temp_table.new_value
FROM temp_table
WHERE table_name.id = temp_table.id;
