I have a table with some columns and 'subject' is one of the columns.
I need to get the first 10 letters from the 'subject' field no matter the 'subject' field contains a string with 100 letters.
例如
表格 - tbl.列 - id、subject、value.
SQL 查询:
SELECT subject FROM tbl WHERE id ='$id';
我得到的结果是，例如
你好，这是我的主题，你好吗
Hello, this is my subject and how are you
我只需要前 10 个字符
I only require the first 10 characters
你好，这个
我可以理解我可以使用 php substr() 删除其余的字符，但在我的情况下这是不可能的.我需要让 MySQL 删除多余的字符.这怎么办?
I can understand that I can remove the rest of the characters using php substr() but that's not possible in my case. I need to get the excess characters removed by MySQL. How can this be done?
