![]() ![]() Now, I have a SQL_events_users_copy CSV in this project with the same data as the original that was used to populate it. With all the same options, we can create a CSV export of our data. By simply changing this from to a to, we could do the inverse. In our first example, we are copying data from a CSV to our database. Also, the copy command is pretty cool, and the fact that it has to use cases. This is telling the copy command that the first row in our CSV is a header row, and not to copy those values over to the table. Finally, header's, again, its on option and it's a Boolean that when present represents true, in absence is false. As you can see, you don't separate these options with commas. First of all, CSV defines the format option. Unlike how these two work to defining an option, CSV and header are individual options. You can think of it like a key value pair. Ours is a CSV, so we want to deliminate the different column values by commas. The default is a tab character in text format. First off, the copy command works with a couple of different formats. The ending of the copy command is how we define options. Next stop, we say from and then the file location of the CSV on your machine. This command will work just fine without listing these out. Our CSV shows that the columns are in the same order as our users table. Next, we could optionally define the columns we want to add data to from our CSV. One of the table is somewhat similar to the following example: DECLARE t TABLE ( id INT, DATA NVARCHAR(30) ) INSERT INTO t Solution 1: Out of (slightly morbid) curiosity I tried to come up with a means of transforming the exact input data you have provided. ![]() We begin by saying copy, then the table we want to copy into so, in our case, the users table. I have a legacy product that I have to maintain. The keyword that makes this possible is this copy command. ![]() When this command runs correctly, we will bulk insert all the rows into our table. Back in the terminal, I'm going to write copy users user_handle, first_name, last_name, email from a file path on my machine delimiter, it's going to be a coma, CSV, and header. I want to bulk add every row as you see here straight into my users database. I have a CSV here that lives locally on my machine. As we can see, our users table is currently empty. Luckily for us, Postgres has an answer for it. Instructor: Importing and exporting data from some type of file source like a CSV within SQL is super common. ![]()
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