SQL is used to communicate with databases in order to manipulate & retrieve data.
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Say you are connected to your database and you have several tables with one of them named, “cars”. The cars table has 4 fields: id, make, model, and year.\nFor whatever reason, your application wants id, make, and model. Your query would look something like this.
\nPreviously, we assumed we were connected to a database and that it had a cars table. What if neither existed? Let’s CREATE the database first since tables are stored in them.\nWe can SHOW the available database by running :\nIt’s that simple! Before we proceed to creating a table for testdb, we must run this command :\nThe commands we run next will apply to this database, unless we specifically USE a different database.
\nWe now have a database, but we are missing the cars table. Let’s CREATE the table.
\nNow let’s insert the rows of data.
\nTo remove all the rows of data in the table, but preserve the table, we would TRUNCATE it.
\nTo remove the table from the database, we would DROP the table.
\nTo learn more, I highly recommend visiting these sites:
\nOn a personal note, I’ve learned MySQL first and my experience with it was great! It doesn’t matter which version of SQL you learn, what matters is learning it! Start a project or include it in one of your existing projects.
\nTHANK YOU
\nFollow @codeherk for tips on Software Development.
\nQuestions? Comments? Requests?
\nLeave a comment below!
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