高手帮忙解释下这段代码~~
s_filter=''
do while s_tempall<>0 then //dowhile 怎么用?
s_filter=s_filter+"bookeyword like '"+trim(left(s_temppall, //left()什么意思?
pos(l_tempall,'',1)))+ "'and"s_tempall=replace(stempall,1,pos //pos() replace()什么意思?(s_tempall,'',1),'')
else
s_filter="bookeyword like'"+s_tempall+"'"
s_tempall=''
end if
loop
我是新手,麻烦大侠解释详细点!!(最好每句都解释下,谢谢了)