Search and replace string inside a column

Question

Hi,
in my table there is Column A with Type NVARCHAR.
i need to search inside all the rows in that column to find the string "_TH" and remove it wherever it exist.
how can i do it?

Answer 1

you can follow below solution .
Step 1: Create a temporary table to load all the records which are having column with '-TH'
Step 2 :  Use update statement and join it with temporary table to update the qualified records
Benefits: This is a set based solution which is optimal and high perfroming
Script:
create table test1(col1 nvarchar(20))
insert into test1 values('one_th'),('two_th'),('Gauri')
--Create Temporary table
select * 
into #tmp2
from Test1
where col1 like '%_TH%'
--update all such rows which are having column with '_TH'
Note: I am replacing all columns with '_TH' with space . you can replace with other characters based upon your requirement.
update t
set col1 = replace(t.col1,'_TH','')
from test1 t
inner join #tmp2 t2
on t.col1 = t2.col1
Please comment If this solution helps you.