我有一個腳本,需要在相同的數據子集上執行四個相當大的MySQL查詢。有沒有辦法將它們組合成一個查詢? 下面是該查詢的樣子: Select sum(value) From
(Select lat, lng, value From `pop_geo_199` Where (
(lat Between 38.1768916977 And 39.6131083023) And (lng
我嘗試計算兩個物體之間的距離。 declare @p1 geography
declare @p2 geography
SELECT @p1 = WKT from tbl_1 where loc = "school"
SELECT @p2 = WKT from tbl_2 where loc = "school"
select round(@p1.STDistance(@p2)/1000,