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CREATE TABLE IF NOT EXISTS CUSTOMERS( ID INT NOT NULL, NAME VARCHAR (20) NOT NULL, AGE INT NOT NULL, ADDRESS CHAR (25), SALARY DECIMAL (18, 2), PRIMARY KEY (ID) ); ALTER TABLE CUSTOMERS ADD COLUMN EMAIL VARCHAR(50); ALTER TABLE CUSTOMERS CHANGE COLUMN ADDRESS LOCATION CHAR(25); ALTER TABLE CUSTOMERS DROP COLUMN LOCATION; TRUNCATE TABLE CUSTOMERS; DROP TABLE IF EXISTS CUSTOMERS;

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