SQL Drop Column Syntax

In MySQL, the SQL syntax for ALTER TABLE Drop Column is

ALTER TABLE "table_name"
DROP "column 1"

In Oracle and SQL Server, the SQL syntax for ALTER TABLE Drop Column is

ALTER TABLE "table_name"
DROP COLUMN "column 1"

Let's look at the example. Assuming our starting point is the "customer" table created in the CREATE TABLE section:

Table customer

Column Name	Data Type
First_Name	char(50)
Last_Name	char(50)
Address	char(50)
City	char(50)
Country	char(25)
Birth_Date	date

Our goal is to drop the "Birth_Date" column. To do this, we key in:

MySQL:
ALTER table customer drop Birth_Date;

SQL Server:
ALTER table customer drop column Birth_Date;

Oracle:
ALTER table customer drop column Birth_Date;

Resulting table structure:

Table customer

Column Name	Data Type
First_Name	char(50)
Last_Name	char(50)
Address	char(50)
City	char(50)
Country	char(25)