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[Basic Grammar] SQL DELETE Statement 본문

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[Basic Grammar] SQL DELETE Statement

grace21110 2023. 10. 14. 11:59
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The DELETE statement is used to remove existing records in a table. 

 

  • DELETE Syntax 
DELETE FROM table_name WHERE condition;

** WARNING: Be careful when you delete records in a table! If you omit the WHERE clause, all records in the table will be deleted. The Where clause in the DELETE statement. **

 

Example 

Delete the customer "Jack Lee" from the "Customers" table:

DELETE FROM Customers WHERE CustomerName = 'Jack Lee';

 

  • Delete all the records 

You can delete all rows in a table without deleting the table. 

 

Example

Delete all rows in the "Students" table, without deleting the table:

DELETE FROM Students;

 

  • Delete a table 

When you want to delete the whole table, use the DROP TABLE statement:

 

Example 

Remove the Brands table:

DROP TABLE Brands;

 

Exercises

Delete all the records from the "Orders" table where the "Status" value is 'Canceled'.

DELETE FROM Orders 
WHERE Status = 'Canceled';