在MySQL select的另一个表中用列的值替换列

Question

I have 2 tables in a database with these sample data:

listings table:

listings.locations_L1 : 'province_far_shiraz'

lang_keys table:

lang_keys.Key : 'data_formats+name+province_far_shiraz'

lang_keys.Value : 'Shiraz City'

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I want to select from table listings and replace values of column listings.locations_L1 with lang_keys.Value in result.

Note that string data_formats+name+ is concatinated to all records of table lang_keys, column Value .

Can you help please?

Answer 1

One way to achieve it would be to join the tables based on comparing to Key to a concatenation data_formats+name+ to listings . locations_L1 in the following way:

SELECT * FROM `listings`
INNER JOIN `lang_keys` ON 
  `lang_keys`.`Key` = CONCAT('data_formats+name+', `listings`.`locations_L1`)