--前期准备数据三个表数据: s_subjtotal_year, subject_item, branch ,decrsubjtotal---informix 查看数据库剩余空间select d.name dbspace,sum(c.chksize*d.pagesize/1020/1024) allocated_MB,sum(c.nfree*d.pagesize/1020/1024) free_MB,round(((sum(c.chksize)-sum(c.nfree))/sum(c.chksi…