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Figure 2: Select the source of data as Database SQL Query

Insert the following query into the "SQL SELECT Query" field.

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This is an example. 
To implement this into your list: 
1. Replace "app_fd_tablename" with your desired table name.
2. Replace dataCreated / dateModified with the desired date column.
3. Replace the aliases with custom aliases.
4. You may configure the date format (%Y-%m-%d %H:%i:%s) accordingly.
5. Insert the following query into the "SQL SELECT Query" field.

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SELECT 
    DATE_FORMAT(MAX(dateCreated), '%Y-%m-%d %H:%i:%s') AS max_dateCreated, 
    DATE_FORMAT(MIN(dateModified), '%Y-%m-%d %H:%i:%s') AS min_dateModified,
FROM 
    app_fd_tablename

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