[英]update mysql table with results from spatial query
我正在使用mysql來計算多邊形要素(postsec)中的點要素(商店)的數量。
我的選擇查詢工作正常,但我想用生成的結果更新表postsec。 我的查詢如下:
select pc_sec, count(*) as count from shops
join postsec on st_within(shops.SHAPE,postsec.SHAPE)
where shops.shop_cat > 0 and shop_cat < 10 group by pc_sec
我已經嘗試了許多方法來執行此操作,例如,更新postsec set new_column =([select query]),但似乎找不到正確的方法。
這樣的事情應該工作
update postsec
inner join
(
select pc_sec, count(*) as pseccount
from shops
join postsec on st_within(shops.SHAPE,postsec.SHAPE)
where shops.shop_cat between 1 and 9
group by pc_sec
) x on x.pc_sec = postsec.id
set count_column = x.pseccount
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