SQL COPY TABLE: How to Copy Data from One Table to Another

SQL COPY TABLE

When working with databases, you may need to duplicate data from one table into another for analysis, backups, or temporary operations. This can be easily achieved using the SELECT INTO statement in SQL.

The SELECT INTO statement allows you to copy the data and structure of an existing table into a new table within the same database.

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Syntax of SELECT INTO Statement

SELECT * INTO New_Table_Name FROM Old_Table_Name;  

SELECT INTO Statement Examples in SQL

To illustrate how to copy data from one table to another, consider the following examples:

Example 1: Copying All Data

Original Table: Vehicles

SQL Query to Copy Data

SELECT * INTO Vehicle_Details FROM Vehicles;  

Resulting Table: Vehicle_Details

Example 2: Copying Specific Columns

Original Table: Gadgets

SQL Query to Copy Selected Columns

SELECT Gadget_Name, Price INTO Gadget_Pricing FROM Gadgets;  

Resulting Table: Gadget_Pricing

Example 3: Using WHERE Clause to Copy Data

Original Table: Books

SQL Query to Copy Specific Rows

SELECT * INTO Self_Help_Books FROM Books WHERE Genre = 'Self-help';  

Resulting Table: Self_Help_Books

Example 4: Adding a Condition to a New Table

Original Table: Laptops

SQL Query to Copy Data with a Price Filter

SELECT * INTO High_End_Laptops FROM Laptops WHERE Price > 75,000;  

Resulting Table: High_End_Laptops

Syntax with WHERE Clause

You can also add conditions using the WHERE clause to filter the data being copied:

SELECT * INTO New_Table_Name FROM Old_Table_Name WHERE [condition];  

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Conclusion

The SELECT INTO statement in SQL provides a seamless way to duplicate data into new tables. Whether copying all records or only specific columns/rows, this method is efficient and easy to use. Use it thoughtfully to manage your data effectively.

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