Altering and Dropping Tables : Alter Table « Table Index « SQL / MySQL

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SQL / MySQL » Table Index » Alter Table 
Altering and Dropping Tables


Drop table Stock;

CREATE TABLE Stock
(
   ID SMALLINT
);

Describe Stock;

ALTER TABLE Stock
ADD COLUMN Quantity SMALLINT UNSIGNED NOT NULL,
MODIFY ID SMALLINT UNSIGNED NOT NULL,
ADD PRIMARY KEY (ID);

Describe Stock;

ALTER TABLE Stock
DROP COLUMN Quantity,
DROP PRIMARY KEY;

Describe Stock;

           
       
Related examples in the same category
1. Altering Database Tables: Add a Column
2. Altering Database Tables: Add More Columns
3. Altering Database Tables: Drop a Column
4. Altering Database Tables: Drop Unique Constraint and Add Primary Key
5. Alter table: add unique
6. Alter table: drop primary and foreign key
7. Alter table: add primary key, foreign key and add column
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