字符串修整

Question

我有一個字符串作爲x='SP0045.32489455187.206205008796197'，我需要該字符串作爲'SP0045.32489455187'。什麼可能是我的SQL查詢。

Answer 1

假設你的規則是discard everything after and including the second "."則：

substr(x, 1, instr(x,'.',1,2)-1) 

詳情請參見的instr和substr文檔。