Jun 2, 2010 · An index is used to speed up the performance of queries. It does this by reducing the number of database data pages that have to be visited/scanned. In SQL Server, a clustered index …

Jul 6, 2011 · 140 Lets say in the employee table, I have created an index (idx_name) on the emp_name column of the table. Do I need to explicitly specify the index name in select clause or it will …

Dec 30, 2024 · The main differences are: 1) OFFLINE index rebuild is faster than ONLINE rebuild. 2) Extra disk space required during SQL Server online index rebuilds. 3) SQL Server locks acquired …

Given an email address column, I need to find the position of the @ sign for substringing. What is the indexof function, for strings in T-SQL? Looking for something that returns the position of a

Jun 23, 2019 · Create index `<index_name>` on `<table_name>` Where (`<Conditions>`) But I do not know what the benefits are? What are the benefits of a filtered index ? Which of columns most be …

May 20, 2010 · When should I use a primary key or an index? What are their differences and which is the best?

Sep 18, 2008 · Both types of index will improve performance when select data with fields that use the index but will slow down update and insert operations. Because of the slower insert and update …

Sep 10, 2015 · I have a very large SQL Server 2008 R2 database (1.5TB) and will be copying some data from column to column within the same table. I've been told that the schema has a large …

Apr 28, 2017 · Here is a SQL query solution that works in SQL Server 2005 and up, that will let you 1) first find all the indexes that need to be rebuilt or reorganized to reduce fragmentation, and then 2) …

CREATE INDEX idx1 ON MyTable (Col1) INCLUDE (Col2, Col3) The INCLUDE clause is new to me. Why would you use it and what guidelines would you suggest in determining whether to create a …