MySQL 触发器根据另一个 table 的列总和更新字段

Question

我有两个 table 'survey' 和 'results'

survey table
-----------------------------------------------
survey_id  | name  | p1q1 | p1q2 | p1q5  
-----------------------------------------------
1          | John  | 10   | 10   | 5 
-----------------------------------------------
2          | Erick | 12   | 15   | 23 
-----------------------------------------------

results table

id  | Uptake | PY5Q1 |
----------------------------
1   | AZT    | NULL  |
----------------------------
2   | UPDP   | NULL  |
----------------------------

我是触发器的新手，我正在尝试弄清楚如何在调查 table 中获取 p1q5 的总和并将其更新为 PY5Q1，其中 id = 1 结果 table 任何想法将不胜感激

CREATE TRIGGER `results` AFTER INSERT ON `survey` FOR EACH ROW BEGIN
UPDATE results SET PY5Q1=(SELECT SUM(p1q5)) WHERE id=1;
END

Answer 1

CREATE TRIGGER `results` AFTER INSERT ON `survey` FOR EACH ROW
BEGIN
UPDATE results SET PY5Q1=(SELECT SUM(p1q5)FROM survey) WHERE id=1;
END

MySQL 触发器根据另一个 table 的列总和更新字段

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