我在检索具有重复 PLAYER_SCORE 的 PLAYER_SCORE 的 PLAYER 时遇到问题。 PLAYER_SCORE 被视为重复的条件是它有其他记录具有相同的 P_ID、SCORE_1、SCORE_2、SCORE_3 和 SCORE_4。
玩家表:
+------+---------+ | P_ID | NAME | +------+---------+ | 12 | Juan | | 13 | Miguel | | 14 | Luna | | 15 | Placido | +------+---------+
PLAYER SCORE TABLE
+-------+------+---------+---------+---------+---------+ | PS_ID | P_ID | SCORE_1 | SCORE_2 | SCORE_3 | SCORE_4 | +-------+------+---------+---------+---------+---------+ | 1 | 1 | 87 | 96 | 79 | 93 | | 2 | 1 | 87 | 96 | 97 | 88 | | 3 | 1 | 87 | 96 | 79 | 93 | | 4 | 2 | 85 | 84 | 85 | 94 | | 5 | 2 | 87 | 96 | 22 | 44 | | 6 | 2 | 85 | 84 | 85 | 94 | | 7 | 3 | 79 | 96 | 82 | 84 | | 8 | 3 | 97 | 96 | 92 | 95 | | 9 | 3 | 87 | 96 | 97 | 87 | | 10 | 4 | 89 | 75 | 99 | 97 | | 11 | 4 | 97 | 96 | 92 | 95 | | 12 | 4 | 87 | 96 | 97 | 87 | +-------+------+---------+---------+---------+---------+
My sql scripts:
Script 1 :
SELECT P.P_ID, NAME FROM PLAYER P
INNER JOIN PLAYER_SCORE PS ON PS.P_ID = P.P_ID
GROUP BY P_ID, SCORE_1, SCORE_2, SCORE_3, SCORE_4
结果:
+------+---------+ | P_ID | NAME | +------+---------+ | 1 | Juan | | 1 | Juan | | 2 | Miguel | | 2 | Miguel | | 3 | Luna | | 3 | Luna | | 3 | Luna | | 4 | Placido | | 4 | Placido | | 4 | Placido | +------+---------+
Script 2 :
SELECT P_ID, NAME FROM (
SELECT P.P_ID, NAME FROM PLAYER P
INNER JOIN PLAYER_SCORE PS ON PS.P_ID = P.P_ID
GROUP BY P_ID, SCORE_1, SCORE_2, SCORE_3, SCORE_4
) AS PLAYER GROUP BY P_ID
结果:
+------+---------+ | P_ID | NAME | +------+---------+ | 1 | Juan | | 2 | Miguel | | 3 | Luna | | 4 | Placido | +------+---------+
预期:
+------+--------+ | P_ID | NAME | +------+--------+ | 1 | Juan | | 2 | Miguel | +------+--------+
任何帮助...谢谢。
最佳答案
您应该只保留重复项，因此使用 HAVING 限制输出:
SELECT P.P_ID, NAME FROM PLAYER P
INNER JOIN PLAYER_SCORE PS ON PS.P_ID = P.P_ID
GROUP BY P_ID, NAME, SCORE_1, SCORE_2, SCORE_3, SCORE_4
HAVING count(*) > 1
关于mysql - 如何在mysql中检索重复的记录，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24359966/