⑴ 关于oracle里过滤重复数据的问题
select A,B max(C) from tab group by A,B
⑵ oracle过滤重复数据 rowid 两张关联表怎么用啊
过滤重复数据用distinct ,不过distinct会排序导致数据库消耗变多
rowid是伪列,一般在索回引的回读中有用答
两张表关联有很多
等值连接和不等值连接
内链接 外连接 自连接
一般两张表通过主键外键连接,连接条件数=表数-1
⑶ oracle语句如何过滤重复信息
select distinct * from
(select
rec.pk_corp as pk_corp ,
rec.barcode ,
sq.ckxh as ckxh,
case when dcb.pk_ql_qdyt_lc_ckpyjj is not null then 0 else dcb.fsgs end as fsnum ,
dcb.cksh as sqbillno,
dcb.gsnum ,
dcb.sygs as synum ,
dcb.fsgs as jjnum ,
dcb.outbillno ,
dcb.outdate
from ql_qdyt_js_receive rec
left join ql_qdyt_lc_cksq sq on rec.barcode=sq.applysamplenum
left join ql_qdyt_dc_qddc dc on sq.applysamplenum=dc.barcode
left join ql_qdyt_dc_qddc_b dcb on dc.pk_qdyt_dc_qddc=dcb.pk_qdyt_dc_qddc
where nvl(rec.dr,0)=0
and nvl(sq.dr,0)=0
and nvl(dc.dr,0)=0
and nvl(dcb.dr,0)=0
and rec.vbillstatus=1
and dc.vbillstatus=1
and sq.vbillstatus=1
and dcb.pk_qdyt_lc_cksq is not null);
⑷ oracle select 如何过滤重复值
select b.DFI_FND_FUND_ID,a.PFU_TOTAL_UNITS,sum(b.DFI_OFFER_PRICE)
from T_POLICY_FUND_UNITS a, T_DAILY_FUND_INFORMATION b
where a.PFU_FND_FUND_ID = b.DFI_FND_FUND_ID
and a.PFU_PFA_POL_POLICY_ID = '1173204101012010'
and a.PFU_LATEST_INDICATOR = 'L'
group by b.DFI_FND_FUND_ID,a.PFU_TOTAL_UNITS
⑸ oracle查询过滤重复相同的数据。
SELECT DISTINCT TA.QA_TYPE TYPE,
TQ.TYPE_DESCRIPTION TYPEDESCRIPTION
FROM T_QA_RULE_DEFINE TA, T_QA_CHECK TQ
WHERE TA.QA_TYPE = TQ.TYPE
AND TA.QA_CHECK_TYPE = TQ.CHECK_TYPE
AND TA.VALID_FLAG = 'Y'
只取这两来个字源段不就行了么,是不是你想要的
⑹ oracle查询语句过滤重复数据问题
select distinct x,y ferom t;
select x,y from t group by x,y;
select * from t group by x,y having count(*)>1 ;--查出有重复记录的数据,如果having count(*)=1 是查出没有重复记录的数据
select * from t a1 where rowid=(select max(rowid) from t a2 where a2.x=a1.x and a2.y=a1.y); --利用rowid唯一,适用于少量重复数据
还有 rank over(partition)这个函数你也可以好好看哈哦
⑺ oracle imp 导入命令 怎么过滤重复数据
1、oracle imp 导入先建立表结构,之后对要过重的数据加上主键这样导入就能过滤。
2、但不建回议在导入时过滤那样答性能会慢,可以先进行导入后去重更简单。
DELETE FROM tab
WHERE ROWID NOT IN(SELECT max(ROWID) from tab a
GROUP BY a.col HAVING COUNT(*) > 1)
这样导入后很快。
⑻ oracle 要查询 多个字段 但是要过滤掉 重复的数据 sql 语句怎么写啊 大神们 帮帮忙啊!
distinct后面也可以跟多个字段啊
要么你用group by 但是group by和distinct的效果是一样的。
⑼ Oracle 根据列值过滤重复数据
select distinct(presonnel_id) from (select id from table_name ordet by DESC ) where rownum < 3
试试
⑽ oracle数据库的过滤问题:如何过滤两个表中相同的部分数据。比如说A表与B表都有记录
试试下面的SQL语句是否符合你的需求: --A:
select XX_id
from tiantiantian
where sum_date=20110420
and XX_status < 30
and XX_type in (1009, 1008, 1003, 1011)
and XX_date > to_date(20110420, 'yyyymmdd')
and not exists(
select xx_id from dididi
where sum_date=20110420
and XX_status < 30
and XX_type in (1009, 1008, 1003, 1011)
and XX_date > to_date(20110420, 'yyyymmdd'));
--B:
select XX_id
from dididi
where sum_date=20110420
and XX_status < 30
and XX_type in (2001)
and XX_date > to_date(20110420, 'yyyymmdd')
and not exists(
select xx_id from tiantiantian
where sum_date=20110420
and XX_status < 30
and XX_type in (2001)
and XX_date > to_date(20110420, 'yyyymmdd'));