culi3118的博客This is the editorial for the July 25th edition of the SitePoint PHP newsletter. 这是SitePoint PHP新闻通讯7月25日版的社论。 Why is a string called a string? Have you ever given this some thought? ...
weixin_39960793的博客mysql字符串拼接并设置null值的实例方法#字符串拼接 concat(s1,s2); 将表中last_name和first_name中的字符串拼接select concat(last_name,first_name) as 姓名 from employees;#只会修改last_name不会修改first_name...