SQL SERVER BLOGS
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- Tables and columns (11)
- Selecting data (7)
- WHERE criteria (5)
- Calculations (7)
- Joins (3)
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- Stored procedures (5)
- SQL programming (5)
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- CTEs, subqueries (6)
- Errors, debugging (2)
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Blogs from Wise Owl on CTEs, subqueries in SQL
Showing blogs 1-6 (out of 6)
Posted by Andy Brown on 01 February 2016
CTEs (or Common Table Expressions) allow you to divide complicated queries up into two or more simple discrete tasks, as this blog explains.
Posted by Andrew Gould on 09 June 2014
Using the Pivot operator in SQL Server allows you to create basic pivot tables from your query results. This blog teaches you how to create simple, static pivots, crosstab-style tables and exciting, dynamic pivot tables.
Posted by Andrew Gould on 08 April 2013
A derived table is a technique for creating a temporary set of records which can be used within another query in SQL. You can use derived tables to shorten long queries, or even just to break a complex process into logical steps.
Posted by Andrew Gould on 28 January 2013
If you’ve been writing SQL queries for a while you’re probably fairly confident with writing single SELECT statements to return a set of records. If you’re ready for a bit more of a challenge, this blog will teach you how to nest one SELECT statement inside another in order to create a subquery. If you’re thinking “that sounds simple enough” then you might want to read to the end of this series, where we’ll attempt to melt your brain by explaining correlated subqueries!
Posted by Andrew Gould on 13 February 2012
This article provides a comprehensive tutorial in Microsoft SQL Server, taking you from the basics of writing SELECT statements all the way through to creating complex stored procedures.
Posted by Andy Brown on 20 October 2011
This blog gives training on writing CTEs in SQL, or Common Table Expressions to give them their full title. The blog also includes a section on creating recursive CTEs.