如何在 postgreSQL 中重复查询，并将结果添加到 table

Question

我需要运行查询 1000 次，并将结果添加到 table。我有以下代码，这是我想重复的代码：

Select max_gridco, count(max_gridco) as TaxLots, sum(population) as pop_sum
from
(
    Select tlid, max_gridco, population
    from (
        select tlid, max_gridco, population, st_intersects(tle.geom, acres025.geom)
        from tle, acres025
        where max_gridco not in (0, 1)
        order by RANDOM()
        limit 1000
    ) as count
    where st_intersects = 't'
    order by max_gridco
) as gridcode_count
group by max_gridco;

有没有办法让我自动运行这 1000 次，并且在输出 table 中有一列包含运行数字？所以我的 table 看起来像下面这样：

运行个数 | max_gridco |税号 | pop_sum

我正在尝试在 PgAdmin3 中执行循环命令，但似乎无法获得正确的语法。

Answer 1

如果您需要插入来自特定 select 的值，您可以使用：

INSERT INTO table2 (column1, column2, column3, ...)
SELECT column1, column2, column3, ...
FROM table1
WHERE condition;

(https://www.w3schools.com/sql/sql_insert_into_select.asp)

这就是你要找的吗？

Answer 2

使用DO块或创建函数，例如：

DO
$$
begin
for i in 1..1000 loop
    insert into save_to_table (Run number,max_gridco,TaxLots,pop_sum)
    Select i, max_gridco, count(max_gridco) as TaxLots, sum(population) as pop_sum
    from
    (
        Select tlid, max_gridco, population
        from (
            select tlid, max_gridco, population, st_intersects(tle.geom, acres025.geom)
            from tle, acres025
            where max_gridco not in (0, 1)
            order by RANDOM()
            limit 1000
        ) as count
        where st_intersects = 't'
        order by max_gridco
    ) as gridcode_count
    group by max_gridco;
end loop;
end;
$$
;

如何在 postgreSQL 中重复查询，并将结果添加到 table

How to repeat a query in postgreSQL, and add the results to a table

postgresql

repeat