UPDATE and REPLACE part of a string

Question

I\'ve got a table with two columns, ID and Value. I want to change a part of some strings in the second column.

Example of Table:

Answer 1

For anyone want to replace your script.

update dbo.[TABLE_NAME] set COLUMN_NAME= replace(COLUMN_NAME, 'old_value', 'new_value') where COLUMN_NAME like %CONDITION%

Answer 2

you should use the below update query

UPDATE dbo.xxx SET Value=REPLACE(Value,'123\','') WHERE Id IN(1, 2, 3, 4)

UPDATE dbo.xxx SET Value=REPLACE(Value,'123\','') WHERE Id <= 4

Either of the above queries should work.

Answer 3

To make the query run faster in big tables where not every line needs to be updated, you can also choose to only update rows that will be modified:

UPDATE dbo.xxx
SET Value = REPLACE(Value, '123', '')
WHERE ID <= 4
AND Value LIKE '%123%'

Answer 4

You don't need wildcards in the REPLACE - it just finds the string you enter for the second argument, so the following should work:

UPDATE dbo.xxx
SET Value = REPLACE(Value, '123\', '')
WHERE ID <=4

(I also added the \ in the replace as I assume you don't need that either)

Answer 5

UPDATE table_name
SET field_name = '0'
WHERE field_name IS Null

Answer 6

Try to remove % chars as below

UPDATE dbo.xxx
SET Value = REPLACE(Value, '123', '')
WHERE ID <=4