Posted on 2012-06-14 15:43
timelyxyz 閱讀(583)
評論(0) 編輯 收藏
pgSql
語法 to_number(text, text)
例子 select to_number(trim(both 'ibs' from classname), '999999') as cn from bbs order by cn /*trim(both 'ibs' from classname)去除classname字段中的'ibs'字符*/
mySql
語法 str*1 / str+1 / -str /*str為varchar的數字，此處不一定是1，只要是數字即可*/
hql
語法 to_number(text, text)
例子 select b from BBS b where b.isDeleted=false order by to_number(trim(both 'ibs' from b.className), '999999')
pgSql數據類型格式化函數