Transfer SQL Data Between Tables - SQL Tutorial

Transferring SQL data between tables is a common task in database management. Whether you need to move data from one table to another, merge data from multiple tables, or split data into separate tables, SQL provides a variety of commands to accomplish these tasks.

├Źndice
  1. Using INSERT INTO SELECT
  2. Using UPDATE and SET
  3. Using INSERT INTO and VALUES
    1. Conclusion

Using INSERT INTO SELECT

The simplest way to transfer data between tables is using the INSERT INTO SELECT statement. This statement allows you to select data from one table and insert it into another table.


INSERT INTO destination_table (column1, column2, column3)
SELECT column1, column2, column3
FROM source_table

Replace "destination_table" with the name of the table you want to insert data into, and "source_table" with the name of the table you want to select data from. You can also specify the columns you want to insert and select using the column names.

Using UPDATE and SET

If you need to update existing data in a table, you can use the UPDATE statement with the SET command. This allows you to modify specific columns in a table based on certain conditions.


UPDATE destination_table
SET column1 = source_table.column1, column2 = source_table.column2
FROM source_table
WHERE destination_table.id = source_table.id

Replace "destination_table" and "source_table" with the names of the tables you want to update and select data from. You can also specify the columns you want to update and select using the column names. The WHERE clause is used to specify the condition for updating data.

Using INSERT INTO and VALUES

If you need to insert specific values into a table, you can use the INSERT INTO statement with the VALUES command. This allows you to insert data into specific columns in a table.


INSERT INTO destination_table (column1, column2, column3)
VALUES (value1, value2, value3)

Replace "destination_table" with the name of the table you want to insert data into. Specify the columns you want to insert data into using the column names, and the values you want to insert into each column using the VALUES command.

Conclusion

Transferring SQL data between tables is a necessary task in database management. SQL provides a variety of commands to accomplish this task, including INSERT INTO SELECT, UPDATE and SET, and INSERT INTO and VALUES. Each of these commands can be used to transfer data between tables in different ways, depending on your specific needs.

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