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SQL and SQL Server blogs from Wise Owl (page 2 of 4)

Showing blogs 21-40 (out of 62)

Introducing three new functions in SQL to make concatenating text easier

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.

Tags:
SQL > Calculations

A table-valued function in SQL to split a comma-delimited list

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.

Tags:
SQL > Functions SSRS > Parameters

Wise Owl have found one SQL structure which slows down code more than any other

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.

Tags:
SQL > General

Mapping stored procedure parameters to SSRS parameters

Posted by Andy Brown on 02 May 2019

This blog explains why you might want to use the PARAMETERS tab in the Dataset Properties dialog box in SSRS.

Tags:
SSRS > Parameters

A new acronym for the order of SQL keywords

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.

Tags:
SQL > Selecting data

Five methods for creating partitions of SSAS Tabular tables programmatically

Posted by Andy Brown on 23 July 2018

Need to generate a partition for a fact table for each year, product or region? This blog gives five approaches, so that you can choose which method is for you.

Tags:
SSAS tabular > Partitions and processing

Using partitions/processing to load a large fact table into a tabular data model

Posted by Andy Brown on 23 July 2018

This blog shows how you can load the empty structure of a large fact table into an Analysis Services tabular data model, then use partitions to bring in the data bit by bit.

Tags:
SSAS tabular > Partitions and processing

Using MERGE and MATCHED in SQL

Posted by Sam Lowrie on 19 June 2018

Learn how to MERGE rows from two tables into one combined table, and how to remove unwanted data from both tables.

Tags:
SQL > Programming tables

How to get rid of lots of blank rows in a Report Builder table

Posted by Andy Brown on 16 February 2018

There seems to be an occasional bug in Report Builder which fills a table with blank rows. Here's one owl's way to get round it.

Tags:
SSRS > Report Builder

Which should you learn: Report Builder or Reporting Services?

Posted by Andy Brown on 16 February 2018

Report Builder and SQL Server Reporting Services are almost identical - which makes the small but important differences even harder to explain.

Tags:
SSRS > Report Builder SSRS > General

Did you know there was an IIF function in SQL to test conditions? We didn't!

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!

Tags:
SQL > Calculations

This blog shows a clever way to annotate expression constraints in SSIS

Posted by Andy Brown on 27 April 2017

If you've added an expression constraint to control flow in a package in Integration Services, this blog will show you how to display what the constraint does automatically.

Tags:
SSIS > Control flow tasks

How to loop over the worksheets in an Excel workbook using Integration Services

Posted by Andy Brown on 21 April 2017

Follow this blog to learn how to use an SSIS package to loop over the worksheets in an Excel XLSX workbook, importing the contents of each.

Tags:
SSIS > Data flow

Speed comparison of temporary tables against table variables

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).

Tags:
SQL > Programming tables

A list of one owl's 5 favourite system stored procedures in SQL!

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.

Tags:
SQL > Stored procedures

Wise Owl coding standards for T-SQL (the SQL dialect used in SQL Server)

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.

Tags:
SQL > General

How to use the FOR XML keywords in SQL to concatenate ids

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.

Tags:
SQL > General

Using SSIS to loop over the worksheets in an Excel workbook, importing each

Posted by Andy Brown on 07 April 2016

Looping over Excel workbooks is one thing, but how can you loop over all of the worksheets in a single workbook, importing the contents of each? This blog explains the steps you need to follow.

Tags:
SSIS > Files and folders

Unpivoting data in SSIS using the Unpivot transformation

Posted by Andy Brown on 07 April 2016

If you've been given the output from a pivot table or a cube, you can collapse it back into its original state using the UNPIVOT transform in Integration Services.

Tags:
SSIS > Data flow

In SSMS, how to add multiple aliases to tables using the ALT key

Posted by Andy Brown on 23 March 2016

It's only a small thing, but … this blog shows how you can click and drag with the ALT key held down, then type to apply a table alias to lots of tables simultaneously.

Tags:
SQL > Tables and columns T-SQL > Other

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