7 September 2022 Dropping tables and fields in Qlik Share this message Every Friday at Bitmetric we’re posting a new Qlik certification practice question to our LinkedIn company page. Last Friday we asked the following Qlik Data Architect certification practice question about dropping fields and tables in Qlik Sense and QlikView: The correct answer is D: DROP FIELD [Fieldname] FROM [Tablename]; The correct way to drop a field after it is no longer needed in Qlik is to use the drop statement. Since the drop statement is also used to drop tables, it is needed to specify what you are going to drop. In this case there are some possibilities. To specify the field or the fields you want to drop. And optionally if you want to drop them from a specific table. The options are demonstrated in the figure below: So starting with the drop statement we can choose to drop all fields using the following syntax: DROP FIELD a; However, be aware that this is only applicable to the tables loaded until that line. All tables loaded after that drop statement containing field a, will still load field a. In best practice if you want to remove those fields, use this in a clean up section at the end of the whole load script. When using a clean up script, it might very well be possible, that some of those fields need to be dropped, while others need to be kept. For example in case when link tables are created. It is then possible to specify from which table to drop the field with the following syntax: DROP FIELD a FROM x; Here field a is only dropped from table x, leaving all other instances of field a in their respective tables. Dropping multiple Qlik fields and tables at once If we would like to drop multiple fields or tables, it is simply done by using the plural and adding the field or table names separated by a comma: DROP TABLES x, y; In this case the tables x and y are dropped from the data model. Needless to say is that there is no option to choose to drop the tables from any other table ;). That’s it for this week. See you next Friday? See you at QlikWorld 2023 in Vegas? Come see us at QlikWorld 2023 for a chance to win a free, lifetime SenseTheme subscription and get some cool swag. Want more Friday Qlik Test Prep? Check out the Friday Qlik Test Prep archive for more Qlik questions and answers. Data Model Friday Qlik Test Prep Script Solution How can we help? Feel free to contact us if you have any comments or questions. Call us Mail us 23 May 2023 What’s New in Qlik Sense May 2023 for Administrators This blog post provides Qlik Sense administrators a summary of the new administrative features and improvements available in Qlik Sense Enterprise on Windows. Let’s get started on what’s new in Qlik Sense for May 2023. New Release Qlik 23 May 2023 What’s New in Qlik Sense May 2023 for Business Users, Analytic Creators and Data Integrators This blog post provides Qlik Sense business users, analytic creators, and data integrators a summary of the features and improvements available in Qlik Sense Enterprise on Windows. Let’s get started with what’s new in Qlik Sense for May 2023. New Release Qlik 11 May 2023 How to make seasonal trendlines in Qlik Sense Every Friday at Bitmetric we’re posting a new Qlik certification practice question to our LinkedIn company page. Last Friday we asked the following Qlik Data Architect certification practice question about how to make seasonal trendlines: The correct answer was B! Trend analysis Qlik has added Time series decomposition modifier functions to the line chart. This can […] Friday Qlik Test Prep Solution
23 May 2023 What’s New in Qlik Sense May 2023 for Administrators This blog post provides Qlik Sense administrators a summary of the new administrative features and improvements available in Qlik Sense Enterprise on Windows. Let’s get started on what’s new in Qlik Sense for May 2023. New Release Qlik
23 May 2023 What’s New in Qlik Sense May 2023 for Business Users, Analytic Creators and Data Integrators This blog post provides Qlik Sense business users, analytic creators, and data integrators a summary of the features and improvements available in Qlik Sense Enterprise on Windows. Let’s get started with what’s new in Qlik Sense for May 2023. New Release Qlik
11 May 2023 How to make seasonal trendlines in Qlik Sense Every Friday at Bitmetric we’re posting a new Qlik certification practice question to our LinkedIn company page. Last Friday we asked the following Qlik Data Architect certification practice question about how to make seasonal trendlines: The correct answer was B! Trend analysis Qlik has added Time series decomposition modifier functions to the line chart. This can […] Friday Qlik Test Prep Solution