Question

我输入了一个单词“boat”，所以我需要以船开头的记录，还包含“船”。但以“船”开头必须首先出现

我试过了

Select   AsiccCodeId,AsiccDescription             
FROM     AsiccCodeMaster  c             
WHERE    c.AsiccDescription like 'boat%' or c.AsiccDescription like '%boat%'

和

select a.* from
(

 Select   AsiccCodeId,AsiccDescription             
 FROM     AsiccCodeMaster  c             
 WHERE c.IsActive = 1  and (GoodFor = 'M' or GoodFor = 'B')
 and c.AsiccDescription like 'Unmilled%'



 UNION

 Select   AsiccCodeId,AsiccDescription             
 FROM     AsiccCodeMaster  c             
 WHERE c.IsActive = 1  and (GoodFor = 'M' or GoodFor = 'B')
 and c.AsiccDescription like '%Unmilled%'



 )a

但它给了我

4137    Combustion Boats 
6360    Boat, Fibre
6361    Boat, Rubber - Motorized
6362    Boat, Wooden Canal Boats
6363    Boat, Wooden With Engine
6370    Wooden Boats Body Building
6374    Boat, Rowing / Sports
6375    Boat, Rubber - Nonmotorized
6376    Boat, Wooden Without Engine-Others
6379    Parts Of Ships, Boats Etc., N.E.C
6391    Ships, Boats & Other Vessels, N.E.C
6394    Ships, Boats & Other Vessels, N.E.C

我需要先以“boat”开头的记录，然后再记录包含“boat”的记录

Answer 1

在Order By子句中使用CASE语句

SELECT   AsiccCodeId,AsiccDescription             
FROM     AsiccCodeMaster  c             
WHERE    c.AsiccDescription like '%boat%'
ORDER BY CASE WHEN c.AsiccDescription like 'boat%' THEN 0 ELSE 1 END, c.AsiccDescription

由于您希望以“船”开头的标题首先出现，因此CASE语句将优先考虑这些标题。它查看每条记录，如果描述以'boat'开头，则为其分配一个排序值0，否则它会为其分配一个排序值1. ORDER BY默认按升序排序，因此它将全部放入0（在所有1（剩余记录）之前以“船”开头的那些

Answer 2

您需要对结果进行一些订购！

SELECT a.* 
FROM
(
    SELECT 
       AsiccCodeId, AsiccDescription, Sequence = 1
    FROM AsiccCodeMaster  c             
    WHERE c.IsActive = 1 AND (GoodFor = 'M' or GoodFor = 'B')
      AND c.AsiccDescription LIKE 'Boat%'    

    UNION

    SELECT 
       AsiccCodeId, AsiccDescription, Sequence = 2
    FROM AsiccCodeMaster  c             
    WHERE c.IsActive = 1 AND (GoodFor = 'M' or GoodFor = 'B')
      AND c.AsiccDescription LIKE '%Boat%'    
) a
ORDER BY a.Sequence

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2 个答案: