Question

我有按部件号输入的搜索功能：

SELECT * FROM parts WHERE PART_NUMBER LIKE '%$searchby%

部分号码会有下划线。上面的查询找不到这些条目。

表格式：

_id   PART_NUMBER     PART_NAME
 1    1234            Plate
 2    1234_1          Bowl
 3    12345           Fork

搜索＆＃34; 1234＆＃34;将返回Plate and Fork，但不是碗。

UPADTE：我想指出搜索PART_NUMBER以获得“碗”＃39;也没有结果。

Answer 1

SELECT * FROM parts WHERE columnName LIKE '%/_%' ESCAPE '/'

Answer 2

这样的事情有用吗？：

declare @string table
    (  stringnumber varchar(30))

insert into @string values ('1234')
insert into @string values ('1234_5')
insert into @string values ('1234_56')
insert into @string values ('12347')

select
*
from 
@string
WHERE  stringnumber like  '1234' or stringnumber like '1234%/_%'  ESCAPE '/'

结果：

stringnumber
1234
1234_5
1234_56

Answer 3

你可以逃避下划线：

$searchby = replace all "_" with "\_"

SELECT * FROM parts WHERE PART_NUMBER LIKE '%$searchby%

请参阅http://dev.mysql.com/doc/refman/5.0/en/string-literals.html

MySQL识别以下转义序列。

\0     An ASCII NUL (0x00) character.
\'     A single quote (“'”) character.
\"     A double quote (“"”) character.
\b     A backspace character.
\n     A newline (linefeed) character.
\r     A carriage return character.
\t     A tab character.
\Z     ASCII 26 (Control-Z). See note following the table.
\\     A backslash (“\”) character.
\%     A “%” character. See note following the table.
\_     A “_” character. See note following the table.

在mySQL数据库中搜索带下划线的条目

3 个答案: