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DEPT_ID INT PRIMARY KEY,
DEPT_NAME VARCHAR(50),
LOCATION VARCHAR(50)
);
INSERT INTO DEPT (DEPT_ID, DEPT_NAME, LOCATION)
VALUES
(1, 'HR', 'New York'),
(2, 'Engineering', 'San Francisco'),
(3, 'Marketing', 'Los Angeles');
SELECT * FROM DEPT;
CREATE TABLE DEPT (
DEPT_ID INT PRIMARY KEY,
DEPT_NAME VARCHAR(50),
LOCATION VARCHAR(50)
);
INSERT INTO DEPT (DEPT_ID, DEPT_NAME, LOCATION)
VALUES
(1, 'HR', 'New York'),
(2, 'Engineering', 'San Francisco'),
(3, 'Marketing', 'Los Angeles');
SELECT * FROM DEPT;
CREATE TABLE EMP (
empid INT PRIMARY KEY,
empname VARCHAR(50),
deptid INT
);
INSERT INTO EMP (empid, empname, deptid)
VALUES
(1, 'John Doe', 101),
(2, 'Jane Smith', 102),
(3, 'Michael Johnson', 101),
(4, 'Emily Brown', 103),
(5, 'David Lee', 102),
(6, 'Sarah Williams', 103);
SELECT DISTINCT deptid
FROM EMP;
CREATE TABLE EMPLOYEE (
empid INT PRIMARY KEY,
empname VARCHAR(50),
salary DECIMAL(10, 2)
);
INSERT INTO EMPLOYEE (empid, empname, salary)
VALUES
(1, 'John Doe', 50000.00),
(2, 'Jane Smith', 60000.00),
(3, 'Michael Johnson', 75000.00),
(4, 'Emily Brown', 70000.00),
(5, 'David Lee', 80000.00),
(6, 'Sarah Williams', 72000.00);
SELECT empname, salary
FROM EMPLOYEE
WHERE salary = (SELECT MAX(salary) FROM EMPLOYEE);
---------------------------
CREATE TABLE EMPLOYEE (
empid INT PRIMARY KEY,empname VARCHAR(50),department VARCHAR(50));
INSERT INTO EMPLOYEE (empid, empname, department)
VALUES
(1, 'John Doe', 'HR'),
(2, 'Jane Smith', 'Finance'),
(3, 'Michael Johnson', 'IT'),
(4, 'Emily Brown', 'Sales');
CREATE TABLE CUSTOMER (
customerid INT PRIMARY KEY,customername VARCHAR(50),empid INT,FOREIGN KEY (empid) REFERENCES EMPLOYEE(empid));
INSERT INTO CUSTOMER (customerid, customername, empid)
VALUES
(101, 'Acme Corp', 1),
(102, 'XYZ Inc', 3),
(103, 'ABC Ltd', 2),
(104, '123 Enterprises', 4);
SELECT EMPLOYEE.empid, empname, department, customerid, customername
FROM EMPLOYEE
LEFT JOIN CUSTOMER ON EMPLOYEE.empid = CUSTOMER.empid;
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