mysql+rownumber的用法_mysql中如何实现row_number

创建一个学生表，插入10条数据CREATE TABLE student (id int, name varchar(20), score integer);

INSERT INTO student VALUES (1, 'jack', 90);

INSERT INTO student VALUES (2, 'tom', 85);

INSERT INTO student VALUES (3, 'allen', 79);

INSERT INTO student VALUES (4, 'michael', 95);

INSERT INTO student VALUES (5, 'steven', 65);

INSERT INTO student VALUES (6, 'kevin', 100);

INSERT INTO student VALUES (7, 'kate', 60);

INSERT INTO student VALUES (8, 'david', 55);

INSERT INTO student VALUES (9, 'kelly', 95);

INSERT INTO student VALUES (10, 'bale', 99);

查询分数小于80分的学生，显示row_numberSELECT @curRow := @curRow + 1 AS row_num,

s.id,

s.name,

s.score

FROM student s

JOIN (SELECT @curRow := 0) r

WHERE s.score < 80;