MySQL统计同比环比SQL

大体思路：

MySQL没有类似oracle方便的统计函数，只能靠自己去硬计算：通过时间字段直接增加年份、月份，然后通过left join关联时间字段去计算环比、同比公式即可

原始表结构：

求同比SQL：

-- 按年同比

SELECT t5.*, CASE WHEN t5.last_energy_year IS NULL OR t5.last_energy_year =0 THEN 0.00
                ELSE FORMAT(((t5.energy_year - t5.last_energy_year)/t5.last_energy_year)*100,2) 
        END YoY  -- 同比
FROM ( 
   SELECT t3.*,t4.last_energy_year
    FROM 
    (
       SELECT DATE_FORMAT(CONCAT(t1.`tyear`, '-', t1.`tmonth`,'-01'),'%Y-%m-%d') AS YearMonth,t1.tyear,SUM(t1.energy_month) energy_year,t1.linename
        FROM(SELECT 
        t.*,COUNT(DISTINCT t.`tyear`,t.`tmonth`,t.`linename`) c_cot 
        FROM `ksh_tgyjy_llxgyjydlxx` t 
        GROUP BY t.`linename`,t.`tyear`,t.`tmonth`,t.`linename`) t1
        GROUP BY t1.tyear,t1.`linename`
     ) t3 
      LEFT JOIN 
    (
      SELECT DATE_ADD(DATE_FORMAT(CONCAT(t1.`tyear`, '-', t1.`tmonth`,'-01'),'%Y-%m-%d'),INTERVAL 1 YEAR) AS lastYearMonth,t1.tyear,SUM(t1.energy_month) last_energy_year,t1.linename
        FROM(SELECT t.*,COUNT(DISTINCT t.`tyear`,t.`tmonth`,t.`linename`) c_cot 
        FROM `ksh_tgyjy_llxgyjydlxx` t 
        GROUP BY t.`linename`,t.`tyear`,t.`tmonth`,t.`linename`) t1
        GROUP BY t1.tyear,t1.`linename`
    ) t4
    ON t3.YearMonth = t4.lastYearMonth
    AND t3.linename = t4.linename 
) t5

查询结果：

求月环比SQL：

-- 按月同比

SELECT DATE_FORMAT(t5.YearMonth,'%Y-%m') YearMonth,t5.`linename`,t5.`energy_month`, 
         CASE WHEN t5.lat_energy_month IS NULL OR t5.lat_energy_month=0 THEN 0.00
                 ELSE FORMAT(((t5.energy_month - t5.lat_energy_month)/t5.lat_energy_month)*100,2) 
        END YoY
FROM ( 
   SELECT t3.*,t4.energy_month lat_energy_month
     FROM 
    (
      SELECT DATE_FORMAT(CONCAT(t1.`tyear`, '-', t1.`tmonth`,'-01'),'%Y-%m-%d') AS YearMonth,t1.*
        FROM(SELECT 
          t.*,COUNT(DISTINCT t.`tyear`,t.`tmonth`,t.`linename`) c_cot 
          FROM `ksh_tgyjy_llxgyjydlxx` t 
          GROUP BY t.`linename`,t.`tyear`,t.`tmonth`,t.`linename`) t1
     ) t3 
       LEFT JOIN 
    (
      SELECT DATE_ADD(DATE_FORMAT(CONCAT(t1.`tyear`, '-', t1.`tmonth`,'-01'),'%Y-%m-%d'),INTERVAL 1 YEAR) AS lastYearMonth,t1.* 
        FROM(SELECT t.*,COUNT(DISTINCT t.`tyear`,t.`tmonth`,t.`linename`) c_cot 
        FROM `ksh_tgyjy_llxgyjydlxx` t 
        GROUP BY t.`linename`,t.`tyear`,t.`tmonth`,t.`linename`) t1
    ) t4
    ON t3.YearMonth = t4.lastYearMonth
    AND t3.linename = t4.linename
) t5

查询结果：