UNION multi select statement with defferent number of columns

Question

Как я могу объединить эти операторы select, чтобы каждая таблица имела разное количество столбцов?

(SELECT title, description, full_description, keywords, option1, option2, option3, option4, option5, option6, option7, option8 FROM articles WHERE title LIKE ? OR description LIKE ? OR full_description LIKE ? OR keywords LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?) 
UNION ALL 
(SELECT title, description, full_description, keywords, option1, option2, option3, option4, option5, option6, option7, option8 FROM news WHERE title LIKE ? OR description LIKE ? OR full_description LIKE ? OR keywords LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?) 
UNION ALL 
(SELECT title, description, full_description, keywords, option1, option2, option3, option4, option5, option6, option7, option8 FROM products WHERE title LIKE ? OR description LIKE ? OR full_description LIKE ? OR keywords LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?) 
UNION ALL 
(SELECT title, description, option1, option2, option3, option4, option5, option6, option7, option8 FROM gallery_images WHERE title LIKE ? OR description LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?) 
UNION ALL 
(SELECT title, description, option1, option2, option3, option4, option5, option6, option7, option8 FROM pages WHERE title LIKE ? OR description LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?) 

я Получать эту ошибку:

The used SELECT statements have a different number of columns 

Answer 1

просто: вы не можете - вы должны добавить некоторые пустые столбцы (например NULL as blank1) для тех подзапросов, которые имеют меньше максимального # столбцов

Answer 2

Просто используйте значение NULL в качестве заполнителя для отсутствующих полей.

Это должно работать:

(SELECT title, description, full_description, keywords, option1, option2, option3, option4, option5, option6, option7, option8 FROM articles WHERE title LIKE ? OR description LIKE ? OR full_description LIKE ? OR keywords LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?) 
UNION ALL 
(SELECT title, description, full_description, keywords, option1, option2, option3, option4, option5, option6, option7, option8 FROM news WHERE title LIKE ? OR description LIKE ? OR full_description LIKE ? OR keywords LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?) 
UNION ALL 
(SELECT title, description, full_description, keywords, option1, option2, option3, option4, option5, option6, option7, option8 FROM products WHERE title LIKE ? OR description LIKE ? OR full_description LIKE ? OR keywords LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?) 
UNION ALL 
(SELECT title, description, NULL AS full_description, NULL AS keywords, option1, option2, option3, option4, option5, option6, option7, option8 FROM gallery_images WHERE title LIKE ? OR description LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?) 
UNION ALL 
(SELECT title, description, NULL AS full_description, NULL AS keywords, option1, option2, option3, option4, option5, option6, option7, option8 FROM pages WHERE title LIKE ? OR description LIKE ? OR option1 LIKE ? OR option2 LIKE ? OR option3 LIKE ? OR option4 LIKE ? OR option5 LIKE ? OR option6 LIKE ? OR option7 LIKE ? OR option8 LIKE ?)