WHEREt.totalsal>(SELECTAVG(totalsal)FROMdept_total); 2)查询部门总薪水大于所有部门平均薪水的部门(进一步优化) 可以看到之前求平均薪资时,执行了两次SELECT语句,其实我们还可以进一步优化,即再定义一个子查询,SQL如下: WITHdept_totalAS (SELECTt1.dname,SUM(t2.sal)totalsa
【a】 第一种方法: 使用wm_concat() + distinct去重聚合 代码语言:javascript 代码运行次数:0 运行 AI代码解释 --第一种方法:使用wm_concat()+distinct去重聚合 select t.department_name depname,t.department_key,wm_concat(distinct t.class_key)asclass_keysfromV_YDXG_TEACHER_KNSRDGLt where1=1group by...
下面将介绍几种常见的 WITHIN 用法示例,包括时间范围和距离范围的应用。 2.1 时间范围查询 假设我们有一个名为orders的表,其中包含订单信息,包括订单号、订单日期等列。我们希望查询最近一个月内的订单记录。可以使用 WITHIN 关键字来实现: SELECT* FROMorders WHEREorder_date>=SYSDATE-INTERVAL'1'MONTHWITHININTERVAL...
RAW if the measure column is RAW; otherwise the return value is VARCHAR2. Aggregate Examples The following single-set aggregate example lists all of the employees in Department 30 in the hr.employees table, ordered by hire date and last name: SELECT LISTAGG(last_name, ‘; ‘) WITHIN GROUP ...
select empno,ename,mgr,sal,deptno,row_number() over(order by empno) rn from emp;--按empno排序 select empno,ename,mgr,sal,deptno,row_number() over(partition by deptno order by empno) rn from emp;--(按部门分组,empno排序)添加一个伪列(和rownum类似) --此分析函数在对数据去重时用的比较多 ...
select ID,Val, min(case when Val=3 then 1 else 0 end) over(partition by ID) as chk1, min(case when Val=3 then 0 else 1 end) over(partition by ID) as chk2, max(case when Val=3 then 1 else 0 end) over(partition by ID) as chk3, max(case when Val=3 then 0 else 1 end...
U1@192.168.8.102/pdb1_ref>select count(*) from t1;COUNT(*) --- 72359六、热克隆中常见的错误错误一:ORA-65040: operation not allowed from within a pluggable database 解决方法:alter session set container=cdb$root;错误二:ORA-17628: Oracle error 1031 returned by remote Oracle server ORA-01031...
Build business resilience with Oracle Cloud Applications. Oracle Cloud Applications, built on best-in class cloud infrastructure, are the most complete suite of applications in the market. With a focus on-customer first, businesses can benefit from the b
'price' A 'price = 100 order by bid_close' 'order by price, bid_close' 'price, bid_close' B 3.3.6.3.1 構造化問合せ句カテゴリA 構造化問合せ句には、次のように、価格列のみの式が含まれています。 SELECT FROM auction WHERE CATSEARCH(title, 'camera', 'price < 200')> 0; SEL...
You can select the columns from various VOs, create an enrichment dataset, and use that dataset to create a data pipeline activation plan. This enables you to seamlessly extract and load data from additional Oracle Applications Cloud VOs and make it readily available in the autonomous data ...