Oracle信息生命周期管理：热图（Heat Map）

-- 创建热图分析所需的视图
CREATE OR REPLACE VIEW heat_map_view AS
SELECT
  column_name,
  LAG(column_name) OVER (ORDER BY column_name) AS prev_column_name,
  LEAD(column_name) OVER (ORDER BY column_name) AS next_column_name,
  column_value,
  LAG(column_value) OVER (ORDER BY column_name) AS prev_column_value,
  LEAD(column_value) OVER (ORDER BY column_name) AS next_column_value
FROM
  your_table;
 
-- 创建热图函数
CREATE OR REPLACE FUNCTION create_heat_map(p_table_name IN VARCHAR2) RETURN VARCHAR2 IS
  v_result VARCHAR2(4000);
BEGIN
  -- 构造SQL语句来生成热图
  v_result := 'SELECT column_name, column_value FROM (SELECT ... )';
  -- 这里应该包含生成热图所需的复杂逻辑
  RETURN v_result;
END;
/
 
-- 调用热图函数
DECLARE
  v_heat_map_sql VARCHAR2(4000);
BEGIN
  v_heat_map_sql := create_heat_map('your_table');
  -- 执行生成的SQL来获取热图结果
  EXECUTE IMMEDIATE v_heat_map_sql;
END;
/

这个例子展示了如何在Oracle数据库中创建一个视图来处理窗口函数LAG和LEAD，以及如何创建和调用一个函数来生成热图分析。这里的SQL语句是伪代码，需要根据实际情况来填充细节。