sql 6个指标采用熵值法进行权重分析得到电力生活指数的代码

这里是一个简单的SQL示例，用于使用熵权法计算电力生活指数的权重。假设您有6个指标：A1，A2，A3，A4，A5和A6，并且已经计算出它们的归一化值。

-- 创建一个临时表来存储归一化后的指标值
CREATE TEMP TABLE normalized_values (
   A1_norm FLOAT,
   A2_norm FLOAT,
   A3_norm FLOAT,
   A4_norm FLOAT,
   A5_norm FLOAT,
   A6_norm FLOAT
);

-- 将归一化后的值插入到临时表中
INSERT INTO normalized_values (A1_norm, A2_norm, A3_norm, A4_norm, A5_norm, A6_norm)
VALUES (0.2, 0.3, 0.5, 0.4, 0.6, 0.7);

-- 计算每个指标的熵值
WITH entropy AS (
   SELECT 
      -A1_norm * LOG(A1_norm) AS A1_entropy,
      -A2_norm * LOG(A2_norm) AS A2_entropy,
      -A3_norm * LOG(A3_norm) AS A3_entropy,
      -A4_norm * LOG(A4_norm) AS A4_entropy,
      -A5_norm * LOG(A5_norm) AS A5_entropy,
      -A6_norm * LOG(A6_norm) AS A6_entropy
   FROM normalized_values
)
-- 计算每个指标的熵值权重
SELECT 
      A1_entropy / (A1_entropy + A2_entropy + A3_entropy + A4_entropy + A5_entropy + A6_entropy) AS A1_weight,
      A2_entropy / (A1_entropy + A2_entropy + A3_entropy + A4_entropy + A5_entropy + A6_entropy) AS A2_weight,
      A3_entropy / (A1_entropy + A2_entropy + A3_entropy + A4_entropy + A5_entropy + A6_entropy) AS A3_weight,
      A4_entropy / (A1_entropy + A2_entropy + A3_entropy + A4_entropy + A5_entropy + A6_entropy) AS A4_weight,
      A5_entropy / (A1_entropy + A2_entropy + A3_entropy + A4_entropy + A5_entropy + A6_entropy) AS A5_weight,
      A6_entropy / (A1_entropy + A2_entropy + A3_entropy + A4_entropy + A5_entropy + A6_entropy) AS A6_weight
FROM entropy;

这段代码将计算每个指标的熵值，并将它们归一化为指标权重。最终，您可以将这些权重与原始指标值相乘，以计算电力生活指数。