有谁有关于如何构建以下查询一个想法:复杂的SQL查询
表:
TBL_GAME id, name
TBL_CATEGORY id, name
LU_GAME_TO_CATEGORY gameid, catid
LU_GAME_TO_EVENT eventid, gameid
所以,基本上Categories
有很多场比赛。
Events
有很多游戏。
我想生成一份报告,显示所列的Games
在Events
中的使用数量。按降序排列。
这可能吗?
有谁有关于如何构建以下查询一个想法:复杂的SQL查询
表:
TBL_GAME id, name
TBL_CATEGORY id, name
LU_GAME_TO_CATEGORY gameid, catid
LU_GAME_TO_EVENT eventid, gameid
所以,基本上Categories
有很多场比赛。
Events
有很多游戏。
我想生成一份报告,显示所列的Games
在Events
中的使用数量。按降序排列。
这可能吗?
SELECT A.ID, SUM(D.INT_QUANTITY) AS YourSum
FROM TBL_CATEGORY A --Adapt your selected columns
INNER JOIN LU_GAME_TO_CATEGORY B ON A.id = B.catid
INNER JOIN TBL_CATEGORY C ON B.gameid = C.id
INNER JOIN LU_GAME_TO_EVENT D ON C.gameid = D.gameid
GROUP BY A.ID
ORDER BY YourSum DESC;
在这里我不调整金额,因为列不存在。 您必须在目标表中添加量列
SELECT
c.id as catId,
c.name as catName,
g.id as gameId,
g.name as gameName,
sum(ge.INT_QUANTITY) as totalQuantities
FROM
TBL_CATEGORY as c,
TBL_GAME as g,
LU_GAME_TO_CATEGORY as gc,
LU_GAME_TO_EVENT as ge
WHERE
c.id = gc.catId AND
g.id = gc.gameId AND
g.id = ge.gameId
GROUP BY
c.id,
g.id
ORDER BY
totalQuantities desc,
c.name,
g.name
嗯,我有工作,当我通过游戏表现出来:SELECT g.TXT_NAME姓名,e.INT_GAME_ID为ID,SUM(e.INT_QUANTITY)作为共有来自LU_GAME_TO_EVENT e,TBL_GAME g其中g.INT_ID = e.INT_GAME_ID GROUP BY e.INT_GAME_ID ORDER BY total DESC – Spunog
所以我需要类似的地方,所有属于一个类别的游戏加在一起,并显示在类别标题 – Spunog