oracle 语句 where t1.row_id=t2.row_id(+)

oracle 语句 where t1.row_id=t2.row_id(+) oracle 中见到一个查询语句,select /*+ index(t1) */ from t1 .,其中/*+ oracle sql 语句中where条件中 1=1 oracle语句报缺失表达式,貌似是decode用法不对?where t1.high_company_id =decode(c1.company_level,'4',select high_company_id from fnd_company_level where company_id= c1.company_id ,c1.company_id ) oracle 语句 缺失表达式错误create or replace view vw_bus_specialtyassessment3 asselectt.year ,t.month ,t.assessdeptid ,t1.objectid ,count(t1.objectid),sum(t1.chargescore),from bus_specialtyassessitem t1,bus_specialtyassessment twhere t1.speci oracle查询语句 select a||','||b||','||c from table where a in('m','n') oracle sql语句获取前两条数据select id,seq from hzds_admin where seq sql语句 后面的(+) select * from t1,t2 where t1.a=t2.b(+) oracle length函数select area_code,area_name from dict_area where length(area_code)=4 ORDER BY area_code asc这句sql语句中的where length(area_code)=4是什么意思? 我有一个这样的语句select * from wspriv_adminlog tt where tt.worker_id in(select t1.worker_id from wspriv_worker t1 where t1.deptid in(select t2.deptid from wspriv_dept t2 where t2.path like '/9/58/%')) ; oracle where 和having从句区别 oracle在where子句中加(+) oracle有and not这个用法吗语句：select a.* from a where a.num='12' and a.name='34'其中and后面加个not oracle中的rownum属性在where语句中大于号不起作用SELECT * FROM abc where rownum > 8这样没有结构SELECT * FROM abc where rownum < 12 这样就行 大于8的都没有小于12的竟然有..... oracle中date类型能比较大小吗?WHERE (OP.RIQI >= '2011-06-01')AND (OP.RIQI < = '2011-07-26')) T1这个写法正确吗?如果正确是不是说时间类型可以比较大小? Oracle中Inner join和Where的区别 在oracle中having为什么不能和where一起用 在oracle中where 子句和having子句中的区别