MySQL在非主密钥的重复更新上插入 [英] MySQL insert on duplicate update for non-PRIMARY key

问题描述

我对重复更新查询中的插入有点困惑. 我有这样的MySQL表结构:

I am little confused with insert on duplicate update query. I have MySQL table with structure like this:

• record_id(PRIMARY，唯一)
• person_id(UNIQUE)
• some_text
• some_other_text

如果我的table.person中存在id，我想更新person的some_text和some_other_text值，否则，请在此表中插入新记录.如果person_id不是PRIMARY，该怎么办?

I want to update some_text and some_other_text values for person if it's id exists in my table.person or insert new record in this table otherwise. How it can be done if person_id is not PRIMARY?

推荐答案

您需要一个查询，以检查是否存在与record_id(或person_id)相关的任何行.如果存在，请更新它，否则插入新行

You need a query that check if exists any row with you record_id (or person_id). If exists update it, else insert new row

IF EXISTS (SELECT * FROM table.person WHERE record_id='SomeValue')
    UPDATE table.person 
    SET some_text='new_some_text', some_other_text='some_other_text' 
    WHERE record_id='old_record_id'
ELSE
    INSERT INTO table.person (record_id, person_id, some_text, some_other_text) 
    VALUES ('new_record_id', 'new_person_id', 'new_some_text', 'new_some_other_text')

另一种更好的方法是

UPDATE table.person SET (...) WHERE person_id='SomeValue'
IF ROW_COUNT()=0
    INSERT INTO table.person (...) VALUES (...)

这篇关于MySQL在非主密钥的重复更新上插入的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！