DROP TABLE IF EXISTS `test_01`;
CREATE TABLE `test_01` (
`id` int(0) NOT NULL,
`user` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '用戶',
`km` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '科目',
`fs` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '分?jǐn)?shù)',
`time` datetime(0) NULL DEFAULT NULL COMMENT '時(shí)間',
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;
INSERT INTO `test_01` VALUES (1, '小三', '語文', '98', '2020-08-06 15:51:21');
INSERT INTO `test_01` VALUES (2, '小三', '數(shù)學(xué)', '90', '2020-07-01 15:51:25');
INSERT INTO `test_01` VALUES (3, '小三', '英語', '77', '2020-06-01 15:51:28');
INSERT INTO `test_01` VALUES (4, '小二', '英語', '78', '2020-06-01 15:51:28');
SELECT
user,
SUM( CASE WHEN km = "語文" THEN fs ELSE 0 END ) "語文",
SUM( CASE WHEN km = "數(shù)學(xué)" THEN fs ELSE 0 END ) "數(shù)學(xué)",
SUM( CASE WHEN km = "英語" THEN fs ELSE 0 END ) "英語"
FROM
test_01
GROUP BY user
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