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Thomas Harlan, Jim McGrath; Reporting Services Team - iatricSystems

Thomas Harlan has been a report writing consultant with iatricSystems® since 2012. Before joining Iatric Systems, his hospital IT positions ranged from programmer to manager to Chief Technology Officer. He has more than 20 years of SQL experience (including Microsoft, Oracle, Informix, and MySQL), as well as 15 years of clinical and business reporting experience, extracting data from a variety of HIS systems including Epic, Lawson, MEDITECH, PeopleSoft, and Siemens Invision.

SSRS: Limit the number of columns on a matrix

For today's blog post, we want to help solve this common problem: how to limit the number of columns in a matrix to prevent it from exceeding the page width, when there may be any number of columns.

The following information is based on Limit no of columns in SSRS matrix report By Challen Fu, Microsoft.

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T-SQL- Reformatting bulk text into a table of lines

MEDITECH stores a lot of bulk text in the DR; usually as a sequenced table of lines, with some line length. That text may or may not be formatted with extra characters to control fonts and bold/italic/etc.

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SSRS Tip: Using wildcards in Report parameters

Searching and filtering free text data can be a problem due to human error. Typos, transposed characters and even data entry into the wrong field present a challenge when trying to report on the data. In a SQL query we can use LIKE and wildcards to try to work around these issues.

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SQL Tip: Improving the Speed of ALL

We recently undertook a project for a customer where we reviewed the top X reports (in terms of usage as logged in SSRS) for performance optimization. Some of their heavy hitters were tying up a lot of DR resources, and slowing things down for everyone.

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SQL Tip: Using SourceID in #Temp tables

Because SourceID is part of the primary key in virtually all MEDITECH Data Repository tables, it is good practice to include SourceID as the first column all indexes, include it in all joins and to identify SourceID in the WHERE clause of the query. In most cases this will cause SQL Server to use an index seek instead of an index scan and greatly improve performance.

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SQL Tip: Returning Significant Digits

From time to time in your work in SQL from the DR, you’ll wind up CAST-ing or CONVERT-ing a number into a string. If that number starts as a DECIMAL or NUMERIC with a scale (the number of places of accuracy to the right of the decimal point) then you will wind up with something like this:

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SSRS Tip: Adding A Tool to Clear the SSRS Data Cache

  • Ever change the logic in your query, confirm new data in SQL, run the report from SSRS… and get the old data?
  • Ever change the columns in your query, run the report from SSRS… and get a weird error – or just not get any data in the new column in the report, but you can see it in SQL?
  • Even if you click the Refresh button????
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SSRS: The Report Issues Link to Report Issues with a Report

Despite all our best efforts, occasionally – rarely – perhaps inconceivably – there are problems with reports or extracts we create for our end users.

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SQL: Finding the Smallest or Largest of a Fixed Set of Values

Recently while working a regulatory report I found myself faced with needing to identify the first (or earliest) of a set of dates. Each date came from a different possible order related to the patient visit, and I needed to chunk through 10 different JOIN-ed tables and get the one with the first / earliest date.

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SQL Tip: To ISNULL() or not to ISNULL()

When we’re working on other people’s code – for troubleshooting or optimization purposes – we see a fair amount of usage of the ISNULL() function. Generally speaking we replace those ISNULL() references with COALESCE().

But why?

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