SQL SERVER BLOGS▼
- General (15)
- Tables and columns (11)
- Selecting data (8)
- WHERE criteria (5)
- Calculations (8)
- Joins (3)
- Grouping (2)
- Views (2)
- Stored procedures (5)
- SQL programming (6)
- Programming tables (4)
- CTEs, subqueries (6)
- Errors, debugging (2)
- Functions (5)
- Dynamic SQL (3)
- Transactions (3)
- Cursors (1)
- Triggers (1)
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Wise Owl Training - SQL blogs (page 1 of 4)
Showing blogs 1-20 (out of 76)
Posted by Sam Lowrie on 01 July 2021
Some of our poor delegates don't have the luxury of a home computer to install SQL on (even worse some have made bad life choices and picked a Mac). The good news is that you can still practise your SQL skills in your web browser, using the impressive SQL Fiddle site. Have no fear, SQL Fiddle is here, a browser based sandbox to bring you cheer!
Posted by Sam Lowrie on 28 April 2021
Normally when SQL Server Management Studio underlines words with what Microsoft call "red squigglies" it's because you haven't refreshed your local cache, but it could also be because of a recent bug - here's how to get round this!
Posted by Andy Brown on 22 March 2021
If you're using SQL Server with compatibility level 130 or greater you can now use the new String_Split function to divide a comma-delimited string into a table of values.
Posted by Sam Lowrie on 22 July 2020
Sam has a terrible sense of humour which is all too often inflicted on his delegates. Sadly, with this blog, on website viewers too ...
Posted by Andy Brown on 16 January 2020
Microsoft have brought out a new SQL editor called Azure Data Studio, to act as a substitute for SQL Server Management Studio, but this owl cannot see any justification for its existence!
Posted by Andy Brown on 10 January 2020
From SQL Server 2016 onwards you can choose to CREATE OR ALTER a procedure, trigger, view or function, as this blog explains.
Posted by Andy Brown on 25 November 2019
If you're working with different time zones, the AT TIME ZONE keywords introduced in SQL Server 2016 will make your life much easier - this blog explains how they work.
Posted by Andy Brown on 20 September 2019
The CONCAT function makes it much easier to join columns together, while the STRING_AGG and CONCAT_WS functions make it easier to create things like comma-delimited lists.
Posted by Andy Brown on 14 August 2019
We're always on the look-out for a new acronym for the order of SQL commands, and are pleased to award a gift voucher to another worthy winner of our competition.
Posted by Andy Brown on 11 June 2019
If you're creating Reporting Services reports using multivalue parameters and stored procedures, you'll find this function to split a list of values into a single-table column useful.
Posted by Andy Brown on 13 May 2019
If your stored procedures or SQL queries are running slowly, don't bother looking at correlated subqueries, cursors, functions or any of the other usual culprits. There's one SQL syntax which Wise Owl have found to be an order of magnitude worse than any other, as this blog shows.
Posted by Andy Brown on 29 March 2019
Someone has finally won our competition to think of a better acronym for the order of keywords in SQL, we're pleased to announce.
Posted by Sam Lowrie on 21 June 2018
Learn how to MERGE rows from two tables into one combined table, and how to remove unwanted data from both tables.
Posted by Andy Brown on 16 February 2018
You can use the IIF function in SQL as an alternative to the CASE WHEN statement. We thought we would share this new (for us) discovery with the world!
Posted by Andy Brown on 23 November 2017
With SQL Server 2012 came the power not just to use pre-defined code snippets, but also to create your own - this blog explains how.
Posted by Andy Brown on 02 March 2017
When you are programming in SQL, you often have the choice of using table variables or temporary tables. This blog considers whether one method is substantially quicker than the other (spoiler alert: not really).
Posted by Andy Brown on 03 February 2017
Everyone has a favourite system stored procedure (you do, don't you?). But five? That's the subject of this blog, anyway.
Posted by Andy Brown on 01 February 2017
A blog setting out an approach to coding in SQL to ensure consistently high standards across your organisation.
Posted by Andy Brown on 16 January 2017
SQL Server 2012 saw the introduction of the T-SQL FORMAT function, making it easier to present dates nicely (no more remembering CONVERT arguments such as 103!). But is it too slow to be really useful? This blog aims to test this scientifically.
Posted by Andy Brown on 27 September 2016
If you want to group items in a SQL query, showing a comma-delimited list of ids for each, generating an XML file is not the obvious place to start - but it should be.