按搜索量查找地區的 SQL 查詢

Question

編寫一個 SQL 查詢，按搜索量對地區進行排名（如果搜索的地區不止一個，則列表中的每個值都算作一次搜索）

Answer 1

首先用逗號分割位置並插入新行

;WITH tmp(search_id, search_location, Location, String) AS
(
    SELECT
        search_id,
        search_location,
        LEFT(String, CHARINDEX(',', String + ',') - 1),
        STUFF(String, 1, CHARINDEX(',', String + ','), '')
    FROM YourTable
    UNION all

    SELECT
        search_id,
        search_location,
        LEFT(String, CHARINDEX(',', String + ',') - 1),
        STUFF(String, 1, CHARINDEX(',', String + ','), '')
    FROM tmp
    WHERE
        String > ''
)

SELECT
    search_id,
    search_location,
    Location
into #temp
FROM tmp

從上表你可以得到計數

SELECT Location, COUNT(*) as [District Count]
FROM #temp
GROUP BY Location
ORDER BY COUNT(*) DESC