Wednesday, 22 July 2015

Sql query to find out duplicate records in sql server

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How to find duplicate values in a table. - CodeProject


  http://www.codeproject.com/Articles/127725/How-to-find-duplicate-values-in-a-table
License This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL) Share email twitter facebook linkedin reddit google+ About the Author Vivek Johari Technical Lead India I am currently working as a Analyst and have around 7.5 years of experience in database. Related article you may be interested in: How to remove duplicate rows from a table in SQL Server (MS KB article) Also, you can simplify your having clause

  http://www.vb6.us/tutorials/introduction-sql-structured-query-language
This is because the ShipperID field is defined as an Autonumber field, thus, whenever a new record is added to the Shippers table, the ShipperID field will automatically populate with the next available number. This would leave out records where the ReportsTo field is NULL, perhaps indicating that the employee is a supervisor and doesn't report to another employee in the Employees table (as is the case for Andrew Fuller)

Using DISTINCT in SQL to eliminate duplicate rows


  http://searchsqlserver.techtarget.com/feature/Using-DISTINCT-in-SQL-to-eliminate-duplicate-rows
Caution: For database systems that include a graphical interface, you can usually request that the result set of a query be displayed in an up-datable grid of rows and columns. For example, if there are 20 people from Bellevue and 7 people from Kent and 14 people from Seattle, the result set displays 20 occurrences of Bellevue, 7 occurrences of Kent, and 14 occurrences of Seattle

  http://blog.sqlauthority.com/2007/07/11/sql-server-count-duplicate-records-rows/
now I want to select only one record out of duplicate records for which column2 values are present (eliminating records for which column2 is blanks(-) from duplicate records) and all other single records having column2 values blanks. Sometimes, you need to find out a given column is duplicated for a given other column: if you have different values for the same value (mostly a foreign key)

  http://www.c-sharpcorner.com/Blogs/10222/sql-query-to-find-out-the-frequency-of-each-element-in-a-col.aspx
Blog SQL Query to find out the frequency of each element in a column By Hemant Srivastava on Oct 17, 2012 This blog explain how we can get the frequency distribution of each element in a column using SQL

  http://www.ehow.com/how_5101042_duplicates-sql.html
More Like This How to Make VBA Faster How to Import Data With SQL Server Management Studio How to Remove Duplicate Email Addresses From an Excel Spreadsheet You May Also Like How to Remove Duplicates in a Query SQL databases keep records and create dynamic environments within web pages

  http://blog.sqlauthority.com/2007/01/10/sql-server-query-to-find-number-rows-columns-bytesize-for-each-table-in-the-current-database-find-biggest-table-in-database/
script the source table and then run the script on destination, where you want to create the table, this will create a table with the same name with all the features of the source table. Tha query will give you properties for that table (columns, keys, values, etc.) I want to pull the same properties from a result set that is not already a table

  http://javarevisited.blogspot.com/2012/12/how-to-find-duplicate-records-in-table-mysql-query-example.html
You can see in first query that it listed Ruby as duplicate record even though both Ruby have different phone number because we only performed group by on name. Can you please write something about DB performance tuning as well as its being repetitvely asked to me and am unable to convince a great deal as I havent really worked on such scenarios December 17, 2012 at 8:07 AM Anonymous said..

tsql - SQL query to find duplicate rows, in any table - Stack Overflow


  http://stackoverflow.com/questions/6683788/sql-query-to-find-duplicate-rows-in-any-table
That is, if I have a users table or a purchases table, the query should be equally capable of catching duplicate rows in either table without any modification (other than the from clause, of course)

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