When you have a string of text with leading or trailing spaces that you wanted to remove, use the TRIM() function in SQL. This function takes a single argument, which is the string you want to trim. For example, if you wanted to trim the string ' hello ', you would use the following query:
Let's look at a few examples of how this function can be used. Suppose you have a table called users with the following data:
If you wanted to trim the leading and trailing spaces from the name column, you would use the following query:
This query would return the result John, Jane, John, and Bob. Notice that the leading and trailing spaces have been removed from each name.
The TRIM() function is supported by most major databases, including MySQL, PostgreSQL, and SQL Server. However, the syntax may vary slightly depending on the database you are using. For more information, check out the documentation for your particular database.