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This article explains how to use the CONCAT, JOIN, LEFT functions in MySQL using the app SQL for Confluence (Pro Edition).

Instructions

Follow the steps:

1. Log into the Confluence instance.

2. Go to the required confluence page and edit the same.

3. Add SQL macro and go to the Edit option to open the settings.
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4. Select the Data source profile and write the SQL statement as shown in the below image. Follow this link to configure Data source profile.
   
   a. CONCAT () - This function allows you to add two or more strings together.
   

   Code Block
   language sql
   SELECT user_name, CONCAT (display_name," ", active," ",created_date) AS Userdetails FROM cwd_user;

   
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    Click on Save settings and Update the page.
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   b. JOIN - A JOIN clause is used to combine rows from two or more tables, based on a related column between them.
   
   In the below example, we have joined two tables cwd_user and cwd_group. Displayed the result based on both the tables.

   Code Block
   language sql
   SELECT user_name,last_name,group_name FROM cwd_user JOIN cwd_group on cwd_user.directory_id = cwd_group.directory_id;

   
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     Click on Save settings and Update the page.
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   c. LEFT () - This function is a string function that returns the left part of a string with a specified length. 
   
       In the below example, the following statement uses the LEFT function to return the 10 leftmost characters of the string group_name. The long group_name can be displayed in a short form if required.
   

   Code Block
   language sql
   SELECT group_name, LEFT(group_name, 10) summary FROM cwd_group;

    

5. Click on Save settings and Update the page.
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