mysql - 如何将 SELECT + WHERE 查询与 INSERT 查询结合使用？

Question

我想结合以下两个查询，谁能给我一个想法如何做到这一点？（仅当查询有结果INSERT时才应运行查询）SELECT

查询 1：

INSERT IGNORE INTO senders(
sender_id,
telephone,
)
VALUES ( 1, 0723355888)

查询 2：

SELECT student_name
FROM students
WHERE student_id =1

Answer 1

INSERT INTO senders (sender_id, telephone)
SELECT student_id, student_telephone FROM students
WHERE student_id = 1
LIMIT 1

或者如果电话不是学生表的一部分，则对其进行硬编码：这是有效的，因为如果查询 0 行，则根本不执行任何插入。

INSERT INTO senders (sender_id, telephone)
SELECT 1, 0723355888 FROM students
WHERE student_id = 1
LIMIT 1

Answer 2

尝试使用此查询 -

INSERT IGNORE INTO senders (sender_id, telephone)  
SELECT student_id as sender_id, telephone
FROM students
WHERE student_id=1

Answer 3

尝试这个：

INSERT IGNORE INTO senders( sender_id, telephone) 
SELECT 1 as sender_id, 0723355888 as telephone 
FROM students WHERE student_id =1