常用建表语句

1、mysql

CREATE TABLE job
( job_id INTEGER NOT NULL PRIMARY KEY
, job_title VARCHAR(50) NOT NULL
);
CREATE TABLE employee
( emp_id INTEGER NOT NULL PRIMARY KEY
, emp_name VARCHAR(50) NOT NULL
, sex VARCHAR(10) NOT NULL
, dept_id INTEGER NOT NULL
, manager INTEGER
, hire_date DATE NOT NULL
, job_id INTEGER NOT NULL
, salary NUMERIC(8,2) NOT NULL
, bonus NUMERIC(8,2)
, email VARCHAR(100) NOT NULL
, CONSTRAINT ck_emp_sex CHECK (sex IN ('男', '女'))
, CONSTRAINT ck_emp_salary CHECK (salary > 0)
, CONSTRAINT uk_emp_email UNIQUE (email)
, CONSTRAINT fk_emp_job FOREIGN KEY (job_id) REFERENCES job(job_id)
, CONSTRAINT fk_emp_manager FOREIGN KEY (manager) REFERENCES employee(emp_id)
);