After your non-clustered indexes are created you can begin querying with them. Indexes use an optimal search method known asbinary search. Binary searches work by constantly cutting the data in half and checking
It is one (of many hopefully) SQL Snacks that has been recorded with the intention of fulfilling a request by a SQL community member looking to learn more about SQL Server. It is straight forward, very basic, beginner level information about Joins with a few examples. Share this: LinkedIn ...
If you are still interested in learning more about Performance tuning with SQL Server, I will be giving an hour long presentation with the PASS DBA Fundamentals Virtual Chapter on January 6, 2015 (11 am Central Time/Noon Eastern Time). For more information please visithttp://dbafundamentals.s...
FULL join is a combination of the LEFT and RIGHT joins. The LEFT join makes sure that all the records of left table are fetched and RIGHT join makes sure all the records of right hand table are fetched. Thus, in FULL join, the obtained records contain the data from whichever table has ...
No complex joins Structure of asingle object is clear What is the differencebetween SQL and NoSQL? The main differenceis that SQL databases are structured (data is stored in the form of tables with rows and columns - like an excel spreadsheet table) while NoSQL is unstructured, and the...
Imagine trying to do SQL joins when tables are on the same machine and when the tables are on different machines! Imagine trying to do maintain ACID characteristics for your transactions when your database is split across various CPUs? Now think trying to do all that on 5 machines, 50 , ...
Let us say you want to count the number of unique values in a given column without doing unnecessary joins and filtering. You can do this using the count() function and passing the DISTINCT clause as the argument. An example usage is as follows: ...
And while this might sound backward to Windows developers, SQL Server on Linux supports the command line interface that Linux geeks prefer. It runs with what Microsoft terms the Platform Abstraction Layer (PAL), which abstracts the core database engine from the operat...
With unpivot you need the column which states the source of the values, what these sources are and the list of columns you want to convert to rows. All the examples so far are with a single table. Often you'll want to use pivots with joins. You can pivot or unpivot the r...
The quick notes from many geeks over the internet is a good start and at some instances, the conciseness of the article might meet our requirement; some other cases, it may direct with some pointers. I believe that knowledge sharing is an effective method to grow with mutual terms. Over ti...