sql语句不能生成并执行

Question

我的参数没乱码，sql却成了select ID,COMMAND,DESCRIPTION,CONTENT from message where 1=1 and COMMAND = ?   select ID,COMMAND,DESCRIPTION,CONTENT from message where 1=1 and DESCRIPTION like '%' ? '%' 参数就没替换上去，这是为什么?那位大神能帮我解决一下

Answer 1

select ID,COMMAND,DESCRIPTION,CONTENT from message where 1=1 and DESCRIPTION like ？

然后后面的东西拼接上去可以吧

Answer 2

where 1=1 是什么鬼

Answer 3

select ID,COMMAND,DESCRIPTION,CONTENT from message where 1=1 and COMMAND = ?这句话没错

select ID,COMMAND,DESCRIPTION,CONTENT from message where 1=1 and DESCRIPTION like '% {$description} %'