How to remove characters
Can you please help?
I want to remove the first two characters of the specific values in a column
coumn1 (varchar2) |
---|
01user |
user_54 |
01 - user_01 |
user_01 |
user |
Please note that the above table has 3 million rows.
I want to delete 01 if it's begging to get:
result
---------
user
user_54
-user_01
user_01
user
is below correct?
select regexp_replace(column1,'01','',1,\a) from my_table
Hello
user9223521 wrote:
Can you please help?
I want to remove the first two characters of the specific values in a column
coumn1 (varchar2) 01user user_54 01 - user_01 user_01 user Please note that the above table has 3 million rows.
I want to delete 01 if it's begging to get:
result
---------
user
user_54
-user_01
user_01
user
is below correct?
- Select regexp_replace(column1,'01','',1,\a)
- from my_table
What happens when try you it?
If you can do something with regular expressions or without, using about the same amount of code, then the path without regular expressions will likely be more effective.
If you want to display all values, including those that do not begin with '01':
SELECT THE CHECK BOX
WHEN column1 AS ' 01% '
THEN SUBSTR (column1, 3)
Of ANOTHER Column1
END AS column1_without_01
FROM my_table;
If you really want to delete '01' connecting the stored data:
UPDATE my_table
SET Column1 = SUBSTR (column1, 3)
WHERE column1 AS ' 01% ';
Tags: Database
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