按特定字段值排序SQL查询

我有一个SQL查询(使用Firebird作为RDBMS),我需要通过字段来订购结果,版本.但是,我需要按字段的内容排序.即"NE"第一,"OE"第二,"OP"第三,空白最后.不幸的是,我不知道如何实现这一目标.我所做过的只是ORDER BY [FIELD] ASC/DESC而已.

有什么建议？

编辑:我真的应该澄清:我只是希望在这里了解更多.我现在拥有它,我只有多个select语句定义哪个首先显示.查询相当大,我真的希望学习一种更有效的方法:例如:

SELECT * FROM RETAIL WHERE MTITLE LIKE 'somethi%' AND EDITION='NE'
UNION 
SELECT * FROM RETAIL WHERE MTITLE LIKE 'somethi%' AND EDITION='OE'
UNION
SELECT * FROM RETAIL WHERE MTITLE LIKE 'somethi%' AND EDITION='OP'
UNION (etc...)

Charles Bret.. 52

Order By Case Edition
    When 'NE' Then 1
    When 'OE' Then 2
    When 'OP' Then 3
    Else 4 End 

Pulsehead.. 6

SELECT 
  /*other fields*/
  CASE WHEN 'NE' THEN 1
    WHEN "OE" THEN 2
    WHEN "OP" THEN 3
    ELSE 4
END AS OrderBy
FROM
  /*Tables*/
WHERE
  /*conditions*/
ORDER BY
  OrderBy,
  /*other fields*/

Peter T. LaC.. 5

将这些值添加到另一个表中,其中包含排名的数字列:

Edition  Rank
NE       1
OE       2
OP       3

加入表格,并在RANK字段上排序.

Order By Case Edition
    When 'NE' Then 1
    When 'OE' Then 2
    When 'OP' Then 3
    Else 4 End 

SELECT 
  /*other fields*/
  CASE WHEN 'NE' THEN 1
    WHEN "OE" THEN 2
    WHEN "OP" THEN 3
    ELSE 4
END AS OrderBy
FROM
  /*Tables*/
WHERE
  /*conditions*/
ORDER BY
  OrderBy,
  /*other fields*/

将这些值添加到另一个表中,其中包含排名的数字列:

Edition  Rank
NE       1
OE       2
OP       3

加入表格,并在RANK字段上排序.