What SQL command can I use to substitute certain values?

Data and Databases
1

I have a list of numeric values as shown below:

0
2323
1003

I need to change just the single zero (0) to 100. When I attempted the following SQL command, it altered other values that contain zero as well:

UPDATE table_name SET field_name = REPLACE(field_name, '0', '100');

Ideally, after executing the command, the values should appear as follows:

100
2323
1003

What SQL command should I utilize to achieve this?

Thank you.

2

hey!
you can use a simple CASE statement within an UPDATE query, targeting specific column values. Like this:

UPDATE table_name SET field_name = CASE WHEN field_name = 0 THEN 100 ELSE field_name END;

This will change only the value that exactly equals 0 to 100 without affecting other numbrs. :blush:

3

When addressing such specific value changes, SQL’s CASE expression provides a precise solution. However, for this scenario, you can use a WHERE clause to further streamline and ensure that only the exact zero values are altered. Here’s an alternative approach:

UPDATE table_name SET field_name = 100 WHERE field_name = 0;

In this way, the command updates only the entries that are exactly zero, safeguarding against unintentional changes in values like “1003.” This method is efficient and ensures correct data transformation.

4

Hey there! i‘m curious, have you considered using a SQL COALESCE function? It might be tricky here, but it’s an interesting method when dealing with changing specific values. What other tecniques have you tried, and how did they perform? I’m excited to see where you’ll take this!