我试图在表中插入选择查询的平均值,但遇到错误
这是我的问题:
INSERT INTO tbl_average(student_id, first_avg) VALUES
('100', AVG(SELECT fir_grad FROM tbl_grade
WHERE student_id='100' AND school_year='2015-2016'))
请帮助
使用INSERT INTO SELECT
语法:
INSERT INTO tbl_average(student_id, first_avg)
SELECT 100, AVG(fir_grad)
FROM tbl_grade
WHERE student_id=100 AND school_year='2015-2016'