How to delete the contents of two columns using code in sql

Delete two columns through the ALTER TABLE statement: 1. Determine the column name to be deleted; 2. Write the statement: ALTER TABLE table_name DROP COLUMN column_name1, column_name2; 3. Execute the statement.

How to delete two columns using SQL code

In SQL you can use ALTER TABLE statement deletes columns in the table. To delete two columns, you can perform the following steps:

1. Determine the columns you want to delete

First, determine the names of the two columns you want to delete from the table .

2. Write an ALTER TABLE statement

Write an ALTER TABLE statement, specifying the table name and the column to be deleted name. The statement syntax is as follows:

<code>ALTER TABLE table_name DROP COLUMN column_name1, column_name2;</code>

3. Execute the statement

Execute this statement using your preferred SQL client (such as MySQL Workbench, PostgreSQL pgAdmin, etc.).

Example

Suppose you have a table named employees with two columns first_name and last_name. To delete these columns, you can execute the following statement:

<code>ALTER TABLE employees DROP COLUMN first_name, last_name;</code>

After executing this statement, table employees will no longer contain first_name and last_name List.

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