mysql return table name

问题

let's say i have this mysql table structure:

table : articles
----------------
id
content

table : news
------------
id
news

is there a way to search for a string in this two tables and then if the string occurs to return the table's name and the row id ?

回答1:

Assuming that the two tables have the same datatypes for id and news/content then a query along the lines of

SELECT id, 'articles' as tablename
WHERE content like '%string to search for%'
UNION
SELECT id, 'news' as tablename
WHERE news like '%string to search for%'

Should give you the result you're after

回答2:

You could try this:

SELECT 'articles' as table_name, id
FROM `articles` 
WHERE content like '%<my_string>%'

UNION

SELECT 'news' as table_name, id 
FROM `news` 
WHERE news like '%<my_string>%'

回答3:

SELECT * FROM (

SELECT id, content as text, 'articles' as tablename
FROM articles

UNION ALL

SELECT  id, news as text, 'news' as tablename
FROM news

) as tmp 

WHERE text = 'SEARCH_TERM'

来源：https://stackoverflow.com/questions/2168068/mysql-return-table-name