mysql查询CREATE TABLE stu3 id int0 NULL DEFAULT NULL name varchar20 CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL age int0 NULL DEFAULT NULL sex varchar5 CHARACTER SET utf8mb4

• 日期: 2028-02-25
• 标签: 社会

SELECT SUBSTRING(name,1,1) AS first_name, COUNT(*) AS count FROM stu3 GROUP BY first_name;

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