按條件排序

Question

我有以下查詢：

select `state` from `table1` 
where `state` in ('NC','North Carolina','TN','Tennessee','CO','Colorado','NM','New Mexico','UT','Utah')
limit 200 offset 0

我需要state排序的結果，因為它們出現在我的where子句中（即第一個NC ，然后是TN ，然后是CO ，依此類推）。

我怎樣才能做到這一點？ 我嘗試使用order by但它沒有給出這個結果。

Answer 1

你可以使用ORDER BY FIELD

SELECT `state`
FROM `table1`
WHERE `state` IN ('NC','North Carolina','TN','Tennessee','CO','Colorado','NM','New Mexico','UT','Utah')
ORDER BY FIELD(`state`, 'NC','North Carolina','TN','Tennessee','CO','Colorado','NM','New Mexico','UT','Utah');

• SQLFiddle演示

Answer 2

SELECT col_name
FROM table_nane
WHERE col_nane IN ('NC','North Carolina','TN','Tennessee','CO','Colorado','NM','New Mexico','UT','Utah')
ORDER BY FIELD(`state`, 'NC',.....);

等等....

Answer 3

嘗試這個：

order by case when `state`='NC' or `state`='North Carolina' then 1 
              when `state`='TN' or `state`='Tennessee' then 2
              when `state`='CO' or `state`='Colorado' then 3
         end 

Answer 4

您可以將ORDER BY與CASE WHEN結構組合使用：

ORDER BY CASE 
            WHEN state = 'NC' THEN 1
            WHEN state = 'North Carolina' THEN 2
            ...
         END