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Write one example for the following ALTER TABLE statement: Add a new column Add primary key constraint Add foreign key constraint Modify an existing column
Write one example for the following ALTER TABLE statement: Add a new column Add primary key constraint Add foreign key constraint Modify an existing column definition Define a default value for the new column Drop a column Rename a column Change table to read-only status
Write one example for the following ALTER TABLE statement:
Add a new column
Add primary key constraint
Add foreign key constraint
Modify an existing column definition
Define a default value for the new column
Drop a column
Rename a column
Change table to read-only status
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