Posted on 2012-06-14 15:43
timelyxyz 阅读(573)
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pgSql
语法 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
语法 str*1 / str+1 / -str /*str为varchar的数字，此处不一定是1，只要是数字即可*/
hql
语法 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数据类型格式化函数