Replace function in sql server

The Replace function in SQL is used to update the content of a string. The function call is REPLACE() for MySQL, Oracle, and SQL Server. The syntax of the Replace function is:

Replace(str1, str2, str3): In str1, find where str2 occurs, and replace it with str3.

Assume we have the following table:

Table Geography region_name store_name
East Boston
East New York
West Los Angeles
West San Diego


If we apply the following Replace function:

SELECT REPLACE(region_name, 'ast', 'astern')
FROM Geography;

Result: region_name
Eastern
Eastern
West
West