product c
==========================================
sample_1 Line
sample_1 LLk
sample_1 LLk
sample_1 LLk
sample_1 LLk
sample_2 LLk
sample_3 LLk
sample_2 LLk
sample_3 LLk
sample_2 Line
加上這個表中的兩個
a h r
==========================================
LLk sample_1 gw
LLk sample_2 okp
LLk sample_3 ijof
Line xe rr3
LLk sample_4 gr2
Line xx2 o3
最後會是這樣..
基於從表2,其中在搜索a = LLk
這是從表1和表2產生的表3
product counts
============================
sample_1 4
sample_2 1
sample_3 2
sample_4 0
細節鏈接,這個問題 http://pastebin.com/ds0iS4GU
如何'sample_2'數爲1的答案?我認爲計數應該是b 2 ..將你的plz寫出確切的條件 – diEcho 2011-02-28 06:46:13