Question

PostgreSQL：Windows机器上的v9.2。

更新：服务器上的postgres版本是9.0，我机器上的版本是9.2.1。

我正在尝试使用以下查询来更新我创建的表。

WITH
    nei_nox AS (SELECT fips, sum(total_emissions) AS x FROM nei_data WHERE 
        pollutant_name ILIKE '%nitrogen%' GROUP BY fips),
    nei_sox AS (SELECT fips, sum(total_emissions) AS x FROM nei_data WHERE 
        pollutant_name ILIKE '%sulfur%' GROUP BY fips),
    nei_co AS (SELECT fips, sum(total_emissions) AS x FROM nei_data WHERE 
        pollutant_name ILIKE '%monoxide%' GROUP BY fips),
    nei_voc AS (SELECT fips, sum(total_emissions) AS x FROM nei_data WHERE 
        pollutant_name ILIKE '%PM10%' GROUP BY fips),
    nei_nh3 AS (SELECT fips, sum(total_emissions) AS x FROM nei_data WHERE 
        pollutant_name ILIKE '%PM2.5%' GROUP BY fips),
    nei_pm10 AS (SELECT fips, sum(total_emissions) AS x FROM nei_data WHERE 
        pollutant_name ILIKE '%volatile%' GROUP BY fips),
    nei_pm25 AS (SELECT fips, sum(total_emissions) AS x FROM nei_data WHERE 
        pollutant_name ILIKE '%ammonia%' GROUP BY fips)

-- INSERT INTO nei_data_by_county
(
    SELECT dat.fips, nei_nox.x as "nox",
         nei_sox.x as "sox",
         nei_co.x as "co",
         nei_voc.x as "voc",
         nei_nh3.x as "nh3",
         nei_pm10.x as "pm10",
         nei_pm25.x as "pm25"
    FROM bts2dat_55.cg_data dat
    LEFT OUTER JOIN nei_nox ON dat.fips = nei_nox.fips
    LEFT OUTER JOIN nei_sox ON dat.fips = nei_sox.fips
    LEFT OUTER JOIN nei_co ON dat.fips = nei_co.fips
    LEFT OUTER JOIN nei_voc ON dat.fips = nei_voc.fips
    LEFT OUTER JOIN nei_nh3 ON dat.fips = nei_nh3.fips
    LEFT OUTER JOIN nei_pm10 ON dat.fips = nei_pm10.fips
    LEFT OUTER JOIN nei_pm25 ON dat.fips = nei_pm25.fips
);

当我在pgAdmin中运行查询时，数据会按预期返回。但是，当我取消评论--INSERT INTO nei_data_by_county时，我收到以下错误：

ERROR:  syntax error at or near "INSERT"
LINE 33: INSERT INTO nei_data_by_county
         ^

我从the documentation知道您可以同时使用WITH语句和INSERT语句，但我无法使此查询正常运行。

是否有其他人遇到此问题？

Answer 1

Data-modifying CTEs仅在PostgreSQL 9.1中引入您的错误信息（版本9.2）让所有人都被愚弄，包括您自己。

使用9.0时无法使用语法。

但解决方案很简单：改用子查询：

INSERT INTO nei_data_by_county (<<provide column list!!>>)
SELECT dat.fips
      ,nei_nox.x   -- as "nox" -- column alias is only for you documentation
       -- more columns
FROM   bts2dat_55.cg_data dat
LEFT   OUTER JOIN (
   SELECT fips, sum(total_emissions) AS x
   FROM   nei_data
   WHERE  pollutant_name ILIKE '%nitrogen%'
   GROUP  BY fips
   ) nei_nox USING (fips)
LEFT OUTER JOIN ... -- more subqueries

一起使用INSERT和WITH语句时出错

1 个答案: