Now the situation is that the duplicate row is in the local temporary table. All we need to now is to delete records from main table customers1 as per matching custid of the local temporary table. Delete from customers1 where custid in (select Custid from #Temp_customers1) Will the above...
All rows in Oracle have a rowid. This is a physical locator. That is, it states where on disk Oracle stores the row. This unique to each row. So you can use this value to identify and remove copies. To do this, replace min() with min(rowid) in the uncorrelated delete: Copy code ...
Recently, I got one request for one script to delete duplicate records in PostgreSQL. Most of the Database Developers have such a requirement to delete duplicate records from the Database. Like SQL Server, ROW_NUMBER() PARTITION BY is also available in PostgreSQL. I have prepared this script...
SELECT id,name,age FROM Test; -- Now delete the duplicate records WITH CTE(id,name,age,Duplicates) AS ( SELECT id,name,age, ROW_NUMBER() OVER (PARTITION BY id, name, age ORDER BY id) AS Duplicates FROM Test ) DELETE FROM CTE WHERE Duplicates > 1 GO Now check the table to make ...
1设定环境如下: Primary数据库 Standby数据库 设置提示,以区分操作的位置 primary数据库 setSQLPROMPTPrimary> standby数据库 setSQLPROMPT StandBy> 1、Primary端设置 归档模式+强制日志 确保primary数据库运行在归档模式 Primary>archiveloglistDatabaselogmode No Archive Mode ...
12 digit unique random number generation in c# / asp.net 2 digits month 2 dimensional ArrayList in VB.NET? 2 minutes before session timeout, warn the user and extend it 2D array - How to check if whole row or column contain same value 302 is sent back to browser when response.redirect...
Can I create a SSIS package to get only row 12 to row 123 from an excel sheet..?? Can I have multiple instances of SSIS on a server? Can I preserve carriage returns in a string variable from SQL Server? Can I query SQL Server Agent Job Step Configuration Parameters Can I Reference ...
关于问题2,其实这个影响行数为2,很容易造成误解,认为是5的行记录和id=10的行记录都发生了更新,其实不是的,它之所以等于2,是因为insert into...on duplicated key update这个语句,它认为自己insert也成功了,update也成功了,所以影响的行数就是2了。
当REPLACE语句在主库执行时,如果先按照insert将记录插入数据表成功,那么在主从同步的binlog日志(binlog_format=row)中,记录的就是insert row event;否则,在主库上“先执行delete后执行insert”这两步操作在binlog中会被记录成了一条update row event。
sql statement: alter system set db_name = ''ORCLASM'' comment= ''Modified by RMAN duplicate'' scope=spfilesql statement: alter system set db_unique_name = ''ORCL'' comment= ''Modified by RMAN duplicate'' scope=spfileOracle instance shut downOracle instance started...