Sql query to delete records from two tables

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How to delete duplicate records using SQL

  http://www.cryer.co.uk/brian/sql/sql_delete_duplicates.htm
Delete duplicate records Delete Duplicate Records using SQL By duplicate record I mean that every field in one record is identical to every field in a different record, i.e. To check that you have duplicate records in your table do the following: select count(*) from MyTable and select distinct * from MyTable unfortunately SQL does not permit a select count(distinct)

  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..

  http://www.allinterview.com/showanswers/82292/single-sql-delete-duplicate-records-from-table-based-column-value-need-only-uniq.html
Which circumstance does the optimizing choose a product join? Thanks for advance cap-gemini 6 IBM QUESTION As all we know PE takes the SQL Request and it will give responce for that query

  http://social.technet.microsoft.com/wiki/contents/articles/22706.how-to-remove-duplicates-from-a-table-in-sql-server.aspx
Result set after the usage of ranking function will look as below with all ranks defined 1 for unique values and all duplicates with values greater than 1

  http://social.technet.microsoft.com/wiki/contents/articles/29229.t-sql-delete-all-rows-from-a-table-except-top-n-rows.aspx
In such a situation, we have two alternatives: Truncate Table In this solution, we can insert the remaining data into a temporary table, truncate the original and finally insert data back in from the temporary table

  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

t sql - deleting large volumes of rows from table efficiently in SQL Server - Database Administrators Stack Exchange

  http://dba.stackexchange.com/questions/65922/deleting-large-volumes-of-rows-from-table-efficiently-in-sql-server
Also, as pointed out in Aaron's post you need to manage the logs as well, either by being in SIMPLE mode or by doing log backups to keep the log files from growing excessively. I am not a DBA per se but seem to recall that deleting a huge volume of rows in one shot can cause transaction log issues, hamper overall system performance during the delete, etc..

Remove Duplicate Rows from a Table in SQL Server - CodeProject

  http://www.codeproject.com/Articles/157977/Remove-Duplicate-Rows-from-a-Table-in-SQL-Server
Why isn't it working ? What is the result and what is the result expected ? It's fine if you don't want to improve your solution, just trying to help you here : your solution delete randomly some rows in a table only because they share 2 values, I don't see where this can be relevant. Easiest way to delete more than one duplicate row from a table in SQL Server Introduction Most of the times, we use primary key or unique key for preventing insertion of duplicate rows in SQL Server

  http://blog.sqlauthority.com/2008/10/17/sql-server-get-common-records-from-two-tables-without-using-join/
SELECT column1 FROM table1 INTERSECT SELECT column1 FROM table2 If you want in the output both column1 and column2 from table1 which has common columns1 in both tables. SELECT column1, column2 FROM table1 WHERE column1 IN ( SELECT column1 FROM table1 INTERSECT SELECT column1 FROM table2 ) To do this, make sure your column1 is unique and do not have duplicate records

  http://javarevisited.blogspot.com/2012/11/how-to-join-three-tables-in-sql-query-mysql-sqlserver.html
Hi all, If I suppose that one employee can belong to severan departments, I would look for employees who do not belong to the sales department, what will be the query? January 1, 2014 at 1:30 PM Emmanuel Ladislaus said... This formula can be extended for more than 3 tables to N tables, You just need to make sure that SQL query should have N-1 join statement in order to join N tables

  http://forums.asp.net/t/1880495.aspx?How+to+delete+multiple+table+record+of+data+manually+from+SQL+Server+Management+Studio+
Go to your table in Object Explorer Right click on table and select Edit Top 200 Rows - In your case number would be changed to what ever you set All record will be opened

mysql - SQL query: Delete all records from the table except latest N? - Stack Overflow

  http://stackoverflow.com/questions/578867/sql-query-delete-all-records-from-the-table-except-latest-n
Without it we'd run into two errors: SQL Error (1093): You can't specify target table 'table' for update in FROM clause - MySQL doesn't allow you to refer to the table you are deleting from within a direct subquery. ); (Normally interpolating a comma-separate list into an SQL statement introduces some risk of SQL injection, but in this case the values are not coming from an untrusted source, they are known to be id values from the database itself.) note: Though this doesn't get the job done in a single query, sometimes a more simple, get-it-done solution is the most effective

sql server - Delete rows from multiple tables using a single query (SQL Express 2005) with a WHERE condition - Stack Overflow

  http://stackoverflow.com/questions/1714545/delete-rows-from-multiple-tables-using-a-single-query-sql-express-2005-with-a
Now when u delete a record from the master table all other details table record based on the deleting rows primary key value, will be deleted automatically

  http://www.codeproject.com/Questions/444015/Single-SQL-Query-to-delete-records-in-two-tables
Now when u delete a record from the master table all other details table record based on the deleting rows primary key value, will be deleted automatically