php追加数据到mysql
追加数据 php mysql
php追加数据到mysql在mysql里的一个表user中有个name的字段
表中已经有一条记录
id字段值是1
name字段的值是"周"
我现在想追加"杰伦"两个字到这个字段中
也就是让这条记录的name字段的值从原来的"周"变成现在的"周杰伦"
请问要怎么操作呢？
如何写代码？
用代码
$sql="update user set name = name + '杰伦' where id='1'";
mysql_query($sql);
以后name字段的值却变成"0"了。
回复讨论(解决方案)
晕死
原来是这样
$sql="update user set name=concat(name,'杰伦') where tId='1'";
mysql_query($sql);
$sql="update user set name = '周杰伦' where id='1'";
$sql="update user set name = '周杰伦' where id='1'";
你这个是直接就把name字段修改成"周杰伦"了，
而不是把"杰伦"追加到"周"的后面。
方法不一样，
到实际应用中是不能起到一样的效果的。
那就用concat
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