I would like to delete multiple substrings from one column. I tried the replace function with the following code:
select replace('testetstestetststst', 'test'||'et'||'s', '')
from dual;
My expected result is ttt, but I get tstst.
In R it works with:
gsub("test|et|s", "", "testetstestetststst")
How can I replace many different substrings with nothing ('') in a column in clob format in Oracle SQL?
You need the REGEXP version of REPLACE:
select regexp_replace('testetstestetststst', 'test|et|s', '')
from dual;
In your code, you are concatenating strings, instead of using an OR operator; that is, your code is equivalent to
select replace('testetstestetststst', 'testets', '')
from dual;
Rather than using regular expressions, you can nest multiple REPLACE functions:
SELECT REPLACE(
REPLACE(
REPLACE(
'testetstestetststst',
'test'
),
'et'
),
's'
)
FROM DUAL;
We can directly use decode function. select decode(job,'clerk','1','manager','2','salesman','3',4) from emp;
This will replace clerk with 1,manager with 2,salesman with 3 and other values with 4.
