ksp records

Label:1, look for redundant records in the table, duplicate records are based on a single field (Peopleid) to determine Select* FROM peoplewhere Peopleid in (selectPeopleidFromPeopleGroupByPeopleidHavingCount (Peopleid)> 1)2, delete redundant records in the table, duplicate records are based on a single field (Peoplei

How I handled 430 million records per day in SQL ServerFirst of all, I am just a programmer, not a professional DBA, the following article is written from a problem solving process, rather than the beginning to give you a correct result, if there is something wrong in the text, please correct the database Daniel, so that I can better deal with this business.Project backgroundThis is to a data center to do a project, the project is very difficult, the

Scenario: There is a table A on the remote Oracle, and a table B with the same table structure exists locally. Due to the fact that a few records from the business system operation were saved in the table B, and some of the records in a were originally imported, none of the records in a are saved. There are 15 records

1, look for redundant records in the table, duplicate records are based on a single field (Peopleid) to determine SELECT * from Peoplewhere Peopleid in (select Peopleid from People GROUP by Peopleid have count (Peopleid) > 1)2, delete redundant records in the table, duplicate records are based on a single field (Peop

Repeat how to find and delete duplicate records in a table Software Environment: 1, Windows nt4.0+oracle 8.0.4 2, the Oracle installation path is: C:\ORANT Issue: 1, when we want to create a unique index for a table, if the table has duplicate records, you cannot create a success. Method principle: 1, Oracle, each record has a rowid,rowid in the entire database is unique, ROWID determines which data files,

The Oracle tutorial you are looking at is: Oracle quickly deletes duplicate records. When working on a project, when a colleague guides the data, he accidentally makes all the data in a table heavier, that is to say, there is a duplicate of all the records in this list. The data for this table is tens, and it is a production system. In other words, you can't delete all the

requires the use of dual-machine hot standby, in order to save the hassle and reduce unnecessary trouble, we put the relevant services together so that we can take full advantage of HA features (externally purchased HA system) System data correctness requirements are extremely abnormal, requires from the bottom of the collection system to the top of the monitoring system, a data can not be poorOur system architecture is as follows, and we can see that the database pressure is very large, es

In the last blog post we introduced several of the most essential records in a DNS server, including A records, NS records, and SOA records. In this blog post we will continue to introduce several other commonly used records of DNS, hoping to help you understand DNS. Four M

store a large amount of historical data, we will carry out a physical sub-table, otherwise every day millions records, a year down is hundreds of millions of. So, the structure of our table is this:CREATETABLE [dbo]. [His20140822] ([No] [bigintIDENTITY (1,1)NotNull,[dtime] [datetime]NotNull,[mgrobjid] [VARCHAR] (36)NotNull,[id] [varchar] (50) not NULL,[value" [varchar] (50) not null, CONSTRAINT [PK_ HIS20140822] primary key CLUSTERED ([ no] ASC) with

Once a friend asked me how to quickly online to a large table to add a field or modify the length of a field, the MySQL version is 5.6, so prepare a test environment to prepare a 100 million records of the table, and then to the actual test in which way faster, first to start preparing 100 million records of the table.I have hundreds of millions of records on the

will carry out a physical sub-table, otherwise every day millions records, a year down is hundreds of millions of. So, the structure of our table is this:CREATETABLE [dbo]. [His20140822] ([No] [bigintIDENTITY (1,1)NotNull,[dtime] [datetime]NotNull,[mgrobjid] [VARCHAR] (36)NotNull,[id] [varchar] (50) not NULL,[value" [varchar] (50) not null, CONSTRAINT [PK_ HIS20140822] primary key CLUSTERED ([ no] ASC) with (pad_index = off, Statistics_norecompute =

Tags: PL/SQL Delete duplicate records--the database is used in the process due to procedural problems sometimes encounter duplicate data, duplicate data causes the database part of the settings are not set correctly ...Method OneDeclare @max integer, @id integerDeclare cur_rows cursor Local for select main field, COUNT (*) from table name Group by main field having count (*) > 1Open Cur_rowsFetch cur_rows into @id, @maxWhile @ @fetch_status =0BeginSel

Wen/Xiachong Nightmare for Developers--delete duplicate recordsPresumably every developer has had a similar experience, and when querying or counting the database, the query and statistic results are inaccurate due to duplicate records in the table. The solution to this problem is to delete the duplicate records and keep only one of them.In SQL Server, in addition to manually deleting a table with more tha