[sql] UPDATE and REPLACE part of a string

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:

ID            Value
---------------------------------
1             c:\temp\123\abc\111
2             c:\temp\123\abc\222
3             c:\temp\123\abc\333
4             c:\temp\123\abc\444

Now the 123\ in the Value string is not needed. I tried UPDATE and REPLACE:

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

When I execute the script SQL Server does not report an error, but it does not update anything either. Why is that?

You have one table where you have date Code which is seven character something like

"32-1000"

Now you want to replace all

"32-"

With

"14-"

The SQL query you have to run is

Update Products Set Code = replace(Code, '32-', '14-') Where ...(Put your where statement in here)

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

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%'

Try to remove % chars as below

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

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%

query:

UPDATE tablename 
SET field_name = REPLACE(field_name , 'oldstring', 'newstring') 
WHERE field_name LIKE ('oldstring%');

CREATE TABLE tbl_PersonalDetail
(ID INT IDENTITY ,[Date] nvarchar(20), Name nvarchar(20), GenderID int);

INSERT INTO Tbl_PersonalDetail VALUES(N'18-4-2015', N'Monay', 2),
                                     (N'31-3-2015', N'Monay', 2),
                                     (N'28-12-2015', N'Monay', 2),
                                     (N'19-4-2015', N'Monay', 2)

DECLARE @Date Nvarchar(200)

SET @Date = (SELECT [Date] FROM Tbl_PersonalDetail WHERE ID = 2)

Update Tbl_PersonalDetail SET [Date] = (REPLACE(@Date , '-','/')) WHERE ID = 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.

replace for persian word

UPDATE dbo.TblNews
SET keyWords = REPLACE(keyWords, '-', N'?')

help: dbo.TblNews -- table name

keyWords -- fild name