YES! That did it! Thank you!!
So, for dekzgimutao - joining just the posts and tags is like this:
SELECT
p.ID,p.post_title,p.post_content,p.post_name,p.post_status,name,taxonomy,
GROUP_CONCAT(DISTINCT name ORDER BY name DESC SEPARATOR '|') AS 'tags'
FROM wp_posts AS p
RIGHT JOIN wp_term_relationships AS tr ON tr.object_id = p.ID
LEFT JOIN wp_term_taxonomy AS tt ON tt.term_taxonomy_id = tr.term_taxonomy_id
LEFT JOIN wp_terms AS t ON t.term_id = tt.term_id
WHERE p.post_type = 'post' AND p.post_status = 'publish' AND taxonomy = 'post_tag'
GROUP BY p.ID
And as Scott says, create the Field Name "tags" and in the "real field name" put: "GROUP_CONCAT(DISTINCT term.name ORDER BY term.name ASC SEPARATOR '|')"
And to join the posts + Advanced Custom Fields + tags is like this:
SELECT
p.ID,p.post_title,p.post_content,p.post_name,p.post_status,name,taxonomy,
m1.meta_value AS My_First_Advanced_Custom_Field,
m2.meta_value AS My_Second_Advanced_Custom_Field,
m3.meta_value AS My_Third_Advanced_Custom_Field,
m4.meta_value AS My_Fourth_Advanced_Custom_Field,
GROUP_CONCAT(DISTINCT name ORDER BY name DESC SEPARATOR '|') AS 'tags'
FROM wp_posts AS p
LEFT JOIN wp_postmeta AS m1 ON m1.post_id = p.ID AND m1.meta_key = 'My_First_Advanced_Custom_Field'
LEFT JOIN wp_postmeta AS m2 ON m2.post_id = p.ID AND m2.meta_key = 'My_Second_Advanced_Custom_Field'
LEFT JOIN wp_postmeta AS m3 ON m3.post_id = p.ID AND m3.meta_key = 'My_Third_Advanced_Custom_Field'
LEFT JOIN wp_postmeta AS m4 ON m4.post_id = p.ID AND m4.meta_key = 'My_Fourth_Advanced_Custom_Field'
RIGHT JOIN wp_term_relationships AS tr ON tr.object_id = p.ID
LEFT JOIN wp_term_taxonomy AS tt ON tt.term_taxonomy_id = tr.term_taxonomy_id
LEFT JOIN wp_terms AS t ON t.term_id = tt.term_id
WHERE p.post_type = 'post' AND p.post_status = 'publish' AND taxonomy = 'post_tag'
GROUP BY p.ID
And again, don't forget to create the "tags" field name per Scott's instructions.
This is wonderful!! Thank you again!!