SQL Into - How to Copy Table Data with Select Into Statement - Quick Tips Ep37
SQL Into - How to Copy Table Data with Select Into Statement - SQL Training Online
In this video, I show you how to copy data using the SQL INTO statement. Including a trick to copy only a table schema in SQL Server.
TABLE OF CONTENTS
00:00 - Intro
01:04 - Select INTO Example
01:58 - Delete Example
02:06 - Insert INTO Select Example
03:50 - Create an Empty table with Select INTO where 1=2
DESCRIPTION
How do you copy a whole table in SQL Server?
You often see the SQL INTO statement when you are using INSERT, but there is a special INTO statement in SQL Server that is used with the SELECT statement that allows you to make a copy of a table for development, testing, or whatever purpose you can think of.
So, to start, let's take a look at the SQL Training Online Simple DB employee table.
You can see that we have 14 records
Now, all we have to do to make a copy of the table is to simply add the SQL INTO clause:
SELECT *
INTO EMPLOYEE_TEST
FROM EMPLOYEE
If we run that, you see that we made a copy of the table with all of the data.
Now, I want to go ahead and empty the employee_test table and show you how to use the INSERT INTO.
If you already have a copy of the table, (I will show you a shortcut in a minute on how to create a copy without data.) then you can use the following insert into statement:
INSERT INTO EMPLOYEE_TEST
SELECT *
FROM EMPLOYEE
After running that statement, you see that I have inserted data from the Employee table into the employee_test table. This is sometimes referred to as INSERT INTO SELECT.
But, there is one trick that I have used throughout the years that is pretty cool.
Sometimes, you want the table schema, but you don't want the data. Now, I know that you can use Management Studio to script out the table for you, but there is an easier way that is more flexible as far as I am concerned.
That is to use the SELECT INTO FROM, but put the following in the WHERE clause:
SELECT *
INTO EMPLOYEE_TEST
FROM EMPLOYEE
WHERE 1=2
The 1=2 makes is so not data will come over, but you get the new table with the right column types.
Is that pretty cool? I have found many uses for this over the years. Let me know what you think bellow.
Let me know what you think by commenting or sharing on twitter, facebook, etc.
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