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delete from kjt_paywhere ORDERNO in ( select T3.ORDERNO from (select T.ORDERNO, count(1) from kjt_pay T group by T.ORDERNO having count(1) > 1) T3) and GUID not in (select T4.max_id f.

https://www.cnblogs.com/muhehe/p/7816808.html; Oracle installation; lsnrctl start; sqlplus /nolog; conn / as sysdba; startup; exit; lsnrctl start; you should do this as the user "oracle"; https://blog.youkuaiyun.com/bameirilyo/article/details/8392925..

Operations1, command line[oracle@localhost ~]$ export ORACLE_SID=orcl #选择自己需要启动的数据库SID[oracle@localhost ~]$ echo $ORACLE_SID #显示实例名orcl[oracle@localhost ~]$ sqlplus /nologSQL*Plus: Release 11.2.0.1.0 Production on Mon Dec ...

1, order by is logical order, where rownum is based on the physical position;2, without order by and only <=select *from T_PF_DEPwhere ROWNUM <= 5000;3, without order by and both <= and >select *from (select * from T_PF_USER where

1, The first salesman to successfully close a deal with a customer is awareded. After the first sale, the subsequent deals with this very same customer is no longer awarded with a bonus.SELECT SUM(...

First Things First:WITH T5 AS ( SELECT T4.NAME, T4.PHONE_NUMBER, T4.TOTAL_POINTS, ROW_NUMBER() OVER ( ORDER BY T4.TOTAL_POINTS DESC ) ROW_NUMBER, RA...

1, Delete The Duplicate Rowsdelete from TB_UTM_CONFIGURATION_TMP where ROWID not in ( select min(ROWID) from TB_UTM_CONFIGURATION_TMP group by PHONE_NUMBER);2, Update The Rowsupdate TB_UT...

1, 使用sum()的时候，null和0是一个意思select count(1) 总PV, count(distinct T.F_PHONE) ...

-- 连抽3天的用户人数select count(distinct T2.F_PHONE)from ( select T1.F_PHONE from ( select T.F_PHONE, trunc(T.F_AWARD_TIME - row_number() ...