打印多个值mysql而不添加它们

Question

让我说我有：

set @a = 1;
set @contents = @a;

set @a = 2;
set @contents = "Contents is " @contents + "," + @a;

我想让它显示：“内容是1,2”

我该怎么做？

Answer 1

我认为您正在寻找CONCAT()功能。

你可以像这样使用它：

set @a = 1;
set @contents = @a;

set @a = 2;
set @contents = concat("Contents is ", @contents, ",", @a);