摘要: select length(f3) - length(replace(f3, 'a','')) from t1简单的,如果,要统计 good 出现的次数,改成select (length(f3) - length(replace(f3, 'good ',''))) / length('good')... 阅读全文
posted @ 2014-11-25 10:41 ICupid 阅读(537) 评论(0) 推荐(0) 编辑