sql-server - 如何在sql server中使用 "like"搜索数据

Question

我输入了一个词“boat”，所以我需要以boat开头并且包含“boat”的记录。但是以“boat”开头的必须先出现

我试着跟随

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，然后是包含“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

由于您希望首先出现以“船”开头的标题，因此 CASE 语句会优先显示这些标题。它查看每条记录，如果描述以“boat”开头，则为其分配排序值 0，否则为其分配排序值 1。ORDER BY 默认按升序排序，因此它将把所有的 0(以 'boat' 开头的)在所有 1 之前(其余记录)