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hello everybody and welcome to another tutorial with learn no star in todays sequel session we are going to take a look at a scenario based sql query which shows how to replace special characters from a string so lets get started we are going to work with the data from the employee table and this is how the data looks like we are mainly concerned here with the address column so the first attempt that we are trying to make is to simply clean the data from the address column and trim any leading or trailing spaces that we might have in this column so lets go ahead and write this query now obviously the first function that comes to your mind is going to be the trim function which is used for this purpose of removing any leading or trailing spaces so lets go ahead and write this query lets select all the columns from this table and then just trim on the address column using the trim function and the expected result is that all the records will have the leading and trailing spaces trim