Select query with where condition in sql server

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Understanding how SQL Server executes a query

  http://rusanu.com/2013/08/01/understanding-how-sql-server-executes-a-query/
The operator at the root of the tree will in turn call the same operation on each of its children operators, and these in turn call the same operations on their child operators and so on. As serialization isolation requires that no new rows appear in a result set when a query is run repeatedly under the same transaction, the way to ensure this requirement is to lock not only the actual rows returned by a query, but also the entire range covering these rows so that concurrent INSERT cannot creep in new rows between the rows already returned by the first execution of the query

SQL Server Query Execution Plan Analysis - SQL Server Performance

  http://www.sql-server-performance.com/2006/query-execution-plan-analysis/
Keep the following in mind when viewing a graphical execution plan: In very complex query plans, the plan is divided into many parts, with each part listed one on top of the other on the screen. If you move your cursor over any of the arrows connecting the steps and sub-steps, you see a pop-up window showing how many records are being moved from one step or sub-step to another step or sub-step

Tricks to increase SQL Server query performance

  http://searchsqlserver.techtarget.com/tip/Tricks-to-increase-SQL-Server-query-performance
ABOUT THE AUTHOR Denny Cherry has over a decade of experience managing SQL Server, including MySpace.com's over 175 million user installation, one of the largest in the world. The first is to create a stored procedure on the remote database and have it return a record set, being a subset of the remote tables, which is then loaded into a local temporary table

  http://www.sqlbook.com/SQL/SQL-WHERE-11.aspx
When using more than one logical operator in the WHERE clause we should use brackets to indicate the order that the compound conditions should be evaluated in. In the next article we examine some more advanced aspects of the WHERE clause that enable our SELECT, UPDATE and DELETE statements to perform additional functionality

SQL Server: CASE Statement

  http://www.techonthenet.com/sql_server/functions/case.php
Applies To The CASE statement can be used in the following versions of SQL Server (Transact-SQL): SQL Server 2014, SQL Server 2012, SQL Server 2008 R2, SQL Server 2008, SQL Server 2005 Example The CASE statement can be used in SQL Server (Transact-SQL)

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://blog.sqlauthority.com/2012/07/27/sql-server-query-to-get-unique-distinct-data-based-on-condition-eleminate-duplicate-data-from-resultset/
USE TempDB GO CREATE TABLE Table1 (ID INT, Product VARCHAR(100), Price INT, Color VARCHAR(100)) GO INSERT INTO Table1 SELECT 1, 'Toy', 100, 'Black' UNION ALL SELECT 2, 'Pen', 100, 'Black' UNION ALL SELECT 3, 'Pencil', 100, 'Blue' UNION ALL SELECT 4, 'Pencil', 100, 'Red' UNION ALL SELECT 5, 'Pencil', 200, 'Yellow' UNION ALL SELECT 6, 'Cup', 300, 'Orange' UNION ALL SELECT 7, 'Cup', 400, 'Brown' GO SELECT Product, Price, Color FROM Table1 GO Select the data without duplicate records as well select the data with maximum price. Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account

  http://blog.sqlauthority.com/2014/09/30/sql-server-update-from-select-statement-with-condition/
USE tempdb; GO CREATE TABLE ItemList (ID INT, ItemDesc VARCHAR(100), Country VARCHAR(100)); INSERT INTO ItemList (ID, ItemDesc, Country) SELECT 1, 'Car', 'USA' UNION ALL SELECT 2, 'Phone', 'India' UNION ALL SELECT 3, 'Computer', 'USA'; GO CREATE TABLE ItemPrice (ID INT, Price VARCHAR(100)); INSERT INTO ItemPrice (ID, Price) SELECT 1, 5000 UNION ALL SELECT 2, 10000 UNION ALL SELECT 3, 20000; GO -- SELECT Data SELECT * FROM ItemList; SELECT * FROM ItemPrice; Now let us write a script which will update the table as per our expectation. Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account

SQL WHERE Clause

  http://www.w3schools.com/sql/sql_where.asp
Below is a selection from the "Customers" table: CustomerID CustomerName ContactName Address City PostalCode Country 1 Alfreds Futterkiste Maria Anders Obere Str