用php更新/添加mysql行中的新值

Question

I want to add a value (varchar) to an existing mysql table, for example I have a table like below

----------------
| id |  value  |
| 01 |    aa   |
----------------

I want to create the table above as the table below

----------------
| id |  value  |
| 01 |  aabb   |
----------------

as you can see, that I want to add the "bb" value in the "aa" table, but I have tried to use the code below but it did not work

mysql_query("UPDATE my_table SET value=value+'$newValue' WHERE id= '01'");

when I use the above code, the results I get differ from what I want

how to fix this problem?

Answer 1

SET value=concat(value,'$newValue');

这就是它的工作方式，您不能通过+添加字符串，请使用concat添加字符串。

Answer 2

尝试这个：

UPDATE my_table SET value = CONCAT(value, 'bb') WHERE id = 01

Answer 3

Use Concat, like so:

UPDATE tablename SET value = CONCAT(value, 'newvalue') WHERE id = '01';

You can read more about Concat here

Answer 4

您可以使用MySQL函数CONCAT（）执行此操作：

mysql_query("UPDATE my_table SET value=CONCAT(value, '$newValue') WHERE id= '01'");