摘要：
转自http://blog.csdn.net/zhjp4295216/article/details/5776954 select path || '%' from t_category where depth = 0 and type = 0用'||'拼接字符串比如path是/1001/的话 那结果就是/1001/% 数字相加SELECT 'A'+'B' 结果为0SELECT "A"+"1" 结果为1SELECT "A"+1 结果为1SELECT 2+1 结果为3=在“ 阅读全文
