如何从varchar列mysql中过滤数据

Question

We have data into our database

id: 1 name: 100 abc
id: 2 name: 200 xyz
id: 3 name: 1000 kku
id: 4 name: 12 yog
id: 5 name: 1 ton

SELECT id from table where name = '${result['name']}'

If someone put into result 100 ABc it will not match because our db has 100 abc, So how can we fix it please guide

I mean it should return me id : 1 if someone put

SELECT id from table where name = '100 ABC' or SELECT id from table where name = '100abc'

Answer 1

The typical way you would handle this would be to just lowercase both of the comparison, eg

SELECT id FROM table WHERE name = LOWER('100 ABC');

A better approach, however, would be to only store lowercase in the table, and then only pass in lowercase data from your application layer. You could consider using a lowercase collation in MySQL for this, but you could also enforce this from the application.

Answer 2

SELECT 
    id
FROM
    `table_name`
WHERE
   LOWER(REPLACE(`name`, ' ', '')) = LOWER(REPLACE('100 abc', ' ', ''));