How can we replace a specific position in a MySQL string?

In MySQL, the functionality of replacing characters at a specific position can be achieved using the SUBSTRING and CONCAT functions.

Suppose there is a table named table1, which includes a field called column1, and we want to replace the third character in column1 with a specified string.

The following are the steps to implement:

1. Use the SUBSTRING function to obtain the substring before the position to be replaced:
2. Retrieve the first two characters from column1 in table1.
3. This will return the first 2 characters in column1.
4. Use the SUBSTRING function to retrieve the substring after the position that needs to be replaced.
5. Retrieve a portion of column1 starting from the 4th character from table1.
6. This will return all characters starting from the fourth character in column1.
7. Combine the two substrings with the replacement string using the CONCAT function.
8. Combine the first 2 characters of column1 with a replacement string and the rest of column1 from table1.
9. This will return the complete string after replacement.
10. If necessary, you can update the replaced string back to the corresponding record in the original table using the UPDATE statement.
11. Update table1 by replacing a specific string in column1 with a new string.
12. The WHERE clause is used to specify which records to update.

Please note that the index positions in the examples above are counted starting from 1. If the positions needing replacement are counted starting from 0, the parameters of the SUBSTRING function will need to be adjusted accordingly.