Java SQL计数显示的不仅仅是计数？

我有很多板球碗的数据库。 架构是：

Player(PlayerID, Initials, Surname)
 - Stores all the players
Bowl(BowlID, Striker, Non-Striker, Bowler, Runs)
 - Stores info for every ball
Team(TeamID, name)
 - Stores all the teams
SquadPlayer(TeamID, PlayerID, MatchID)
 - Stores a record of who was playing at each match and for which team

我想找出英格兰队每个球员的得分是多少。（我使用的是openoffice风格的HSQL）

这是我正在尝试运行的SQL，但它无法运行。如果我省略了SELECT部分的前两列（Player.Initials和Player.姓氏），它可以很好地工作，但它不是很有用，因为我无法计算出谁得了所有的6分

我通过java运行它，我得到一个异常：

java.sql.SQLException: Not in aggregate function or group by clause

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那么为什么这不起作用呢？如何在旁边显示名称？

选择子句中的任何字段都需要使用聚合函数，或者包含在

分组依据

子句中，这就是为什么会出现此错误。因此，您必须在

GROUPBY

子句中包含

“Player”“Initials”“Player”“姓氏”

，或者对它们使用聚合函数。比如：

SELECT "Player"."Initials", "Player"."Surname", 
      COUNT ("Bowl"."Striker") AS "No. Sixes"
FROM "Bowl", "Player", "Player" AS "Bowler"
WHERE "Bowl"."Striker" = "Player"."PlayerID"
AND "Bowl"."Bowler" = "Bowler"."PlayerID"
AND "Bowl"."Striker" IN (
    SELECT DISTINCT "Player"."PlayerID" 
    FROM "Player", "Team", "SquadPlayer"
    WHERE "Player"."PlayerID" = "SquadPlayer"."PlayerID" 
    AND "Team"."TeamID" = "SquadPlayer"."TeamID" 
    AND "Team"."Name" = 'England' )
AND "Bowl"."Runs" = '6'
GROUP BY "Bowl"."Striker", "Player"."Initials", "Player"."Surname"

---

SELECT

子句中的任何字段都需要使用聚合函数，或者包含在

GROUP BY

子句中，这就是您出现此错误的原因。因此，您必须在

GROUPBY

子句中包含

“Player”“Initials”“Player”“姓氏”

，或者对它们使用聚合函数。比如：

SELECT "Player"."Initials", "Player"."Surname", 
      COUNT ("Bowl"."Striker") AS "No. Sixes"
FROM "Bowl", "Player", "Player" AS "Bowler"
WHERE "Bowl"."Striker" = "Player"."PlayerID"
AND "Bowl"."Bowler" = "Bowler"."PlayerID"
AND "Bowl"."Striker" IN (
    SELECT DISTINCT "Player"."PlayerID" 
    FROM "Player", "Team", "SquadPlayer"
    WHERE "Player"."PlayerID" = "SquadPlayer"."PlayerID" 
    AND "Team"."TeamID" = "SquadPlayer"."TeamID" 
    AND "Team"."Name" = 'England' )
AND "Bowl"."Runs" = '6'
GROUP BY "Bowl"."Striker", "Player"."Initials", "Player"."Surname"

---

您的分组依据应该是未聚合的列

SELECT "Player"."Initials", "Player"."Surname", COUNT ("Bowl"."Striker") AS "No. Sixes"
FROM "Bowl", "Player", "Player" AS "Bowler"
WHERE "Bowl"."Striker" = "Player"."PlayerID"
AND "Bowl"."Bowler" = "Bowler"."PlayerID"
AND "Bowl"."Striker" IN (
    SELECT DISTINCT "Player"."PlayerID" 
    FROM "Player", "Team", "SquadPlayer"
    WHERE "Player"."PlayerID" = "SquadPlayer"."PlayerID" 
    AND "Team"."TeamID" = "SquadPlayer"."TeamID" 
    AND "Team"."Name" = 'England' )
AND "Bowl"."Runs" = '6'
GROUP BY "Player"."Initials", "Player"."Surname"

---

您的分组依据应该是未聚合的列

SELECT "Player"."Initials", "Player"."Surname", COUNT ("Bowl"."Striker") AS "No. Sixes"
FROM "Bowl", "Player", "Player" AS "Bowler"
WHERE "Bowl"."Striker" = "Player"."PlayerID"
AND "Bowl"."Bowler" = "Bowler"."PlayerID"
AND "Bowl"."Striker" IN (
    SELECT DISTINCT "Player"."PlayerID" 
    FROM "Player", "Team", "SquadPlayer"
    WHERE "Player"."PlayerID" = "SquadPlayer"."PlayerID" 
    AND "Team"."TeamID" = "SquadPlayer"."TeamID" 
    AND "Team"."Name" = 'England' )
AND "Bowl"."Runs" = '6'
GROUP BY "Player"."Initials", "Player"."Surname"

当select子句中有count（或任何聚合函数）时，select子句中所有未聚合的列也必须出现在group by子句中

使您的分组依据子句如下所示：

GROUP BY "Bowl"."Striker", "Player"."Initials", "Player"."Surname"

当您的select子句中有一个count（或任何聚合函数）时，select子句中所有未聚合的列也必须出现在group by子句中

使您的分组依据子句如下所示：

GROUP BY "Bowl"."Striker", "Player"."Initials", "Player"."Surname"

---

如果在查询中使用count、sum等（聚合函数），则在聚合中检索到的所有不在聚合中的列都必须在group by子句中

将您的分组按子句更改为

GROUP BY  "Player"."Initials", "Player"."Surname"

---

若在查询中使用count、sum等（聚合函数），则检索到的不在聚合中的所有列都必须在GROUPBY子句中

将您的分组按子句更改为

GROUP BY  "Player"."Initials", "Player"."Surname"