How to delete a row of data in a table in SQL

The DELETE statement is used to delete a row of data from a table. The syntax is: DELETE FROM table_name WHERE condition; the steps include: establishing a connection, writing a statement, executing a statement, confirming changes; Notes: permanently deleting data, restriction conditions, and only applicable to tables.

How to use SQL to delete a row of data in a table

In SQL, you can use the DELETE statement to delete a row of data in a table. The syntax of this statement is as follows:

 <code class="sql">DELETE FROM table_name WHERE condition;</code>

in:

• table_name is the table name to delete the data.
• condition is the condition for the row to be deleted.

For example, to delete a row with id 5 from a table named customers , you can use the following statement:

 <code class="sql">DELETE FROM customers WHERE id = 5;</code>

Steps to execute a DELETE statement:

1. Establish a database connection: Use SQL client or programming language to establish a connection to the database.
2. Write DELETE statement: Write DELETE statement based on the conditions of the row to be deleted.
3. Execution statement: Execute DELETE statements using SQL client or programming language.
4. Confirm changes: Check the data in the table to confirm that the target row has been successfully deleted.

Notes:

• The DELETE statement will permanently delete the data. Before deleting the data, make sure it has been backed up.
• If condition does not specify any rows, it will delete all rows from the table.
• You can use the LIMIT clause to limit the number of rows to be deleted.
• The DELETE statement applies only to tables. To delete a view or other database object, you need to use a different statement.

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