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orAClE 筛选出

oracle筛选用where子句。 如emp表中有如下内容: 现要筛选出deptno为10的数据,可用如下语句: select * from emp where deptno=10;

可用row_number来实现。 如emp表中有如下数据: 现要提取按sal排序后,sal最大的一条数据,可用如下语句: select t.* from(select row_number() over (order by sal desc) rn,emp.* from emp) twhere rn=1;查询结果:

试试 select * from table_name a where a.unitcost=(select min(unitcost) from ( select * from contractline where itemnum='1001' and linestatus='已批准' and contracttype='价格') a)

select * from (SELECT *,row_number() over(partition by shenfenzheng order by shenfenzheng) as rn FROM peo_base_info ) aa where rn > 1你试试

select a.* from test_table a,(select c3 from test_table group by c3 having count(*) > 1 ) b where a.c3 = b.c3 order by c3; 或者 select * from test_table where c3 in (select c3 from test_table group by c3 having count(*) > 1 ) o...

create table new_table as select ... from ... where ...

用like语句查询。 SQL Server语法如下(如查询包含spt的表) select name from sys.objects where type='U' and name like '%spt%';结果: Oracle语法...

select * from 表名 where rownum

没看懂你的意思啊?你说id对应client_id的内容,但是图片上面id与client_id并不对应啊!你的意思是不想要重复的内容吗?

只要中文的,比较难,你确定你的表中没有韩文,日文,这就好办啊! 无论是阿拉伯数字,还是英文字母,ascii码最大不超过122 select * from tab where ascii(att1)>122; 试试可以吗 如果不考虑性能的话,可以这么做 select * from tab where subs...

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