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[Music] all right hi everyone and welcome to todays sql office hour session this month were continuing the backed basis back to basics theme by talking about delete so how do we remove data from the database so the basics of delete is pretty straightforward you just have delete from your table where we have some rows and we remove that those data from the table so one thing to know is that the from clause is optional ive had some people kind of tell me off in the past for writing deletes without proms and saying it doesnt work its absolutely optional you can do both or either they do both work um its kind of really up to you ill leave it out generally just less typing right so but it doesnt make any real difference um next thing is with the where cause so that removes all the where claws well all the warehouse or the rows where the where clause is true um and another final little thing in this while you are removing those the rows they are locked so other people are trying to u