在SQL中進行行之間的數據轉換通常需要使用一些聚合函數和子查詢來實現。以下是一些常見的方法：
SELECT
CASE
WHEN column_name = value1 THEN 'new_value1'
WHEN column_name = value2 THEN 'new_value2'
ELSE 'default_value'
END AS new_column
FROM table_name;
SELECT t1.column1, t2.new_column
FROM table1 t1
JOIN (
SELECT column_name,
CASE
WHEN column_name = value1 THEN 'new_value1'
WHEN column_name = value2 THEN 'new_value2'
ELSE 'default_value'
END AS new_column
FROM table2
) t2 ON t1.column1 = t2.column_name;
SELECT
column1, SUM(column2) AS total_column2
FROM table_name
GROUP BY column1;
這些方法可以幫助在SQL中實現行之間的數據轉換，具體使用哪種方法取決于需要實現的具體需求和數據結構。
