php - SQL order by content of IN statement

Question

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Ordering by the order of values in a SQL IN() clause

I have a simple query statement that pulls properties in a database by zip codes. I use an IN() statement to pass in multiple zip codes. If those zip codes are in order (increasingly further from a target zip code) is it possible to order the results by the order the zip codes are passed into the IN() statement?

For example say i have the zip codes: 77808, 77805, 77806, 77807. I pass them into my query like so

$query = "SELECT * FROM Properties WHERE zip_code IN('77808', '77805', '77806', '77807',)";

Could i order the results by properties that have the zip code of 77808 first, then 77805, then 77806, etc.? or would i need to order it after i pulled it out of the database with PHP(in this case)?

Answer 1

如果你使用 Mysql，那么你可以使用FIELD函数。

SELECT * FROM Properties 
WHERE zip_code IN('77808', '77805', '77806', '77807')
ORDER BY FIELD(zip_code, '77808', '77805', '77806', '77807')

Answer 2

SELECT * FROM (
   SELECT 1 as my_order, p.* FROM Properties p WHERE zip_code = '77808'
   UNION ALL
   SELECT 2 as my_order, p.* FROM Properties p WHERE zip_code = '77805'
   UNION ALL 
   SELECT 3 as my_order, p.* FROM Properties p WHERE zip_code = '77806'
   UNION ALL
   SELECT 4 as my_order, p.* FROM Properties p WHERE zip_code = '77807'
) temp_table
ORDER BY my_order ASC