Oracle SQL查询以查找字符串中是否存在字符

Question

I am using oracle database and trying to find out the query which should return the result when there is a special character(',`,(,)) exist on the string.

I am trying something like this,

select username from users where username like (',`,~,(,));

I tried to achieve the same using the below query,

select username from users where (username like '%`%' OR username like '%~%');

It doesn't consider the second condition and returns the value to the first condition only.

Is there any function/methods using which this result can be fetched?

Answer 1

You can use regular expressions and check all special characters with one condition:

SELECT username 
FROM users 
WHERE regexp_instr(username,'[''`\(\)]') > 0

Answer 2

没有正则表达式的老派风格

where length(translate(username, '_''`~()', '_')) <> length(username)