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Mysql怎样控制replace替换的次数?
2022-07-07 11:47:00 【全栈程序员站长】
我想把“ABC是ABC”替换成“123是ABC”,也就是找出第一个ABC替换成123,MYSQL命令应该怎么写?
UPDATE data SET body=REPLACE(body, ‘ABC’, ‘123’);我用这个命令时会把所有ABC都替换成123,不知道怎么控制替换次数,请高人指教。
hemu780924大哥的代码虽然能用,但是有个致命的缺陷,
比如"123是ABC",如果想找出XYZ并替换成OPQ,因为在"123是ABC"找不到XYZ,然后命令就会在"123是ABC"前面插入XYZ,这个不是我想要的啊!
update table1 set body =
concat(
SUBSTRING(body ,1,position('ABC' in body )-1),
'123',
substring(body ,position('ABC' in body )+length('ABC'))) where body like '%ABC%'
这里替换第一次的ABC ,没有ABC就不替换了
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