Replace first occurrence of substring in a string in SQL

Question

I have to fetch data from a @temp table which has something like \"or ccc or bbb or aaa\" I want to replace the first occurrence into space to get something like this \" ccc

Answer 1

You can use a combination of STUFF and CHARINDEX to achieve what you want:

SELECT STUFF(col, CHARINDEX('substring', col), LEN('substring'), 'replacement')
FROM #temp

CHARINDEX('substring', col) will return the index of the first occurrence of 'substring' in the column. STUFF then replaces this occurrence with 'replacement'.