postgresql中基础sql查询
- 创建表
- 插入数据
- 创建索引
- 删除表
- postgresql命令速查
- 简单查询
- 计算查询结果
- 利用查询条件过滤数据
- 模糊查询
创建表
-- 部门信息表
CREATE TABLE departments( department_id INTEGER NOT NULL -- 部门编号，主键, department_name CHARACTER VARYING(30) NOT NULL -- 部门名称, manager_id INTEGER -- 部门经理的员工编号, location_id INTEGER -- 部门所在位置编号, CONSTRAINT dept_id_pk PRIMARY KEY (department_id)) ;-- 职位信息表
CREATE TABLE jobs( job_id CHARACTER VARYING(10) NOT NULL -- 职位编号，主键, job_title CHARACTER VARYING(35) NOT NULL -- 职位名称, min_salary INTEGER -- 最低月薪, max_salary INTEGER -- 最高月薪, CONSTRAINT job_id_pk PRIMARY KEY(job_id)) ;-- 员工信息表
CREATE TABLE employees( employee_id INTEGER NOT NULL -- 员工编号，主键, first_name CHARACTER VARYING(20) -- 名字, last_name CHARACTER VARYING(25) NOT NULL -- 姓氏, email CHARACTER VARYING(25) NOT NULL -- 邮箱, phone_number CHARACTER VARYING(20) -- 电话号码, hire_date DATE NOT NULL -- 入职日期, job_id CHARACTER VARYING(10) NOT NULL -- 职位编号, salary NUMERIC(8,2) -- 月薪, commission_pct NUMERIC(2,2) -- 销售提成百分比, manager_id INTEGER -- 经理, department_id INTEGER -- 部门编号, CONSTRAINT emp_emp_id_pk PRIMARY KEY (employee_id), CONSTRAINT emp_salary_min CHECK (salary > 0) , CONSTRAINT emp_email_uk UNIQUE (email), CONSTRAINT emp_dept_fk FOREIGN KEY (department_id) REFERENCES departments(department_id), CONSTRAINT emp_job_fk FOREIGN KEY (job_id) REFERENCES jobs(job_id), CONSTRAINT emp_manager_fk FOREIGN KEY (manager_id) REFERENCES employees(employee_id)) ;ALTER TABLE departments ADD CONSTRAINT dept_mgr_fk FOREIGN KEY (manager_id) REFERENCES employees(employee_id);-- 员工详细信息视图
CREATE VIEW emp_details_view(employee_id,job_id,manager_id,department_id,location_id,first_name,last_name,salary,commission_pct,department_name,job_title)
AS SELECTe.employee_id, e.job_id, e.manager_id, e.department_id,d.location_id,e.first_name,e.last_name,e.salary,e.commission_pct,d.department_name,j.job_title
FROMemployees e,departments d,jobs j
WHERE e.department_id = d.department_idAND j.job_id = e.job_id;
插入数据
ALTER TABLE departments ALTER CONSTRAINT dept_mgr_fk DEFERRABLE INITIALLY DEFERRED;BEGIN;
INSERT INTO departments VALUES ( 10, 'Administration', 200, 1700);INSERT INTO departments VALUES ( 20, 'Marketing', 201, 1800);INSERT INTO departments VALUES ( 30, 'Purchasing', 114, 1700);INSERT INTO departments VALUES ( 40, 'Human Resources', 203, 2400);INSERT INTO departments VALUES ( 50, 'Shipping', 121, 1500);INSERT INTO departments VALUES ( 60 , 'IT', 103, 1400);INSERT INTO departments VALUES ( 70 , 'Public Relations', 204, 2700);INSERT INTO departments VALUES ( 80 , 'Sales', 145, 2500);INSERT INTO departments VALUES ( 90 , 'Executive', 100, 1700);INSERT INTO departments VALUES ( 100 , 'Finance', 108, 1700);INSERT INTO departments VALUES ( 110 , 'Accounting', 205, 1700);INSERT INTO departments VALUES ( 120 , 'Treasury', NULL, 1700);INSERT INTO departments VALUES ( 130 , 'Corporate Tax', NULL, 1700);INSERT INTO departments VALUES ( 140 , 'Control And Credit', NULL, 1700);INSERT INTO departments VALUES ( 150 , 'Shareholder Services', NULL, 1700);INSERT INTO departments VALUES ( 160 , 'Benefits', NULL, 1700);INSERT INTO departments VALUES ( 170 , 'Manufacturing', NULL, 1700);INSERT INTO departments VALUES ( 180 , 'Construction', NULL, 1700);INSERT INTO departments VALUES ( 190 , 'Contracting', NULL, 1700);INSERT INTO departments VALUES ( 200 , 'Operations', NULL, 1700);INSERT INTO departments VALUES ( 210 , 'IT Support', NULL, 1700);INSERT INTO departments VALUES ( 220 , 'NOC', NULL, 1700);INSERT INTO departments VALUES ( 230 , 'IT Helpdesk', NULL, 1700);INSERT INTO departments VALUES ( 240 , 'Government Sales', NULL, 1700);INSERT INTO departments VALUES ( 250 , 'Retail Sales', NULL, 1700);INSERT INTO departments VALUES ( 260 , 'Recruiting', NULL, 1700);INSERT INTO departments VALUES ( 270 , 'Payroll', NULL, 1700);INSERT INTO jobs VALUES ( 'AD_PRES', 'President', 20080, 40000);
INSERT INTO jobs VALUES ( 'AD_VP', 'Administration Vice President', 15000, 30000);INSERT INTO jobs VALUES ( 'AD_ASST', 'Administration Assistant', 3000, 6000);INSERT INTO jobs VALUES ( 'FI_MGR', 'Finance Manager', 8200, 16000);INSERT INTO jobs VALUES ( 'FI_ACCOUNT', 'Accountant', 4200, 9000);INSERT INTO jobs VALUES ( 'AC_MGR', 'Accounting Manager', 8200, 16000);INSERT INTO jobs VALUES ( 'AC_ACCOUNT', 'Public Accountant', 4200, 9000);
INSERT INTO jobs VALUES ( 'SA_MAN', 'Sales Manager', 10000, 20080);INSERT INTO jobs VALUES ( 'SA_REP', 'Sales Representative', 6000, 12008);INSERT INTO jobs VALUES ( 'PU_MAN', 'Purchasing Manager', 8000, 15000);INSERT INTO jobs VALUES ( 'PU_CLERK', 'Purchasing Clerk', 2500, 5500);INSERT INTO jobs VALUES ( 'ST_MAN', 'Stock Manager', 5500, 8500);
INSERT INTO jobs VALUES ( 'ST_CLERK', 'Stock Clerk', 2008, 5000);INSERT INTO jobs VALUES ( 'SH_CLERK', 'Shipping Clerk', 2500, 5500);INSERT INTO jobs VALUES ( 'IT_PROG', 'Programmer', 4000, 10000);INSERT INTO jobs VALUES ( 'MK_MAN', 'Marketing Manager', 9000, 15000);INSERT INTO jobs VALUES ( 'MK_REP', 'Marketing Representative', 4000, 9000);INSERT INTO jobs VALUES ( 'HR_REP', 'Human Resources Representative', 4000, 9000);INSERT INTO jobs VALUES ( 'PR_REP', 'Public Relations Representative', 4500, 10500);INSERT INTO employees VALUES ( 100, 'Steven', 'King', 'SKING', '515.123.4567', TO_DATE('17-06-2003', 'dd-MM-yyyy'), 'AD_PRES', 24000, NULL, NULL, 90);INSERT INTO employees VALUES ( 101, 'Neena', 'Kochhar', 'NKOCHHAR', '515.123.4568', TO_DATE('21-09-2005', 'dd-MM-yyyy'), 'AD_VP', 17000, NULL, 100, 90);INSERT INTO employees VALUES ( 102, 'Lex', 'De Haan', 'LDEHAAN', '515.123.4569', TO_DATE('13-01-2001', 'dd-MM-yyyy'), 'AD_VP', 17000, NULL, 100, 90);INSERT INTO employees VALUES ( 103, 'Alexander', 'Hunold', 'AHUNOLD', '590.423.4567', TO_DATE('03-01-2006', 'dd-MM-yyyy'), 'IT_PROG', 9000, NULL, 102, 60);INSERT INTO employees VALUES ( 104, 'Bruce', 'Ernst', 'BERNST', '590.423.4568', TO_DATE('21-05-2007', 'dd-MM-yyyy'), 'IT_PROG', 6000, NULL, 103, 60);INSERT INTO employees VALUES ( 105, 'David', 'Austin', 'DAUSTIN', '590.423.4569', TO_DATE('25-06-2005', 'dd-MM-yyyy'), 'IT_PROG', 4800, NULL, 103, 60);INSERT INTO employees VALUES ( 106, 'Valli', 'Pataballa', 'VPATABAL', '590.423.4560', TO_DATE('05-02-2006', 'dd-MM-yyyy'), 'IT_PROG', 4800, NULL, 103, 60);INSERT INTO employees VALUES ( 107, 'Diana', 'Lorentz', 'DLORENTZ', '590.423.5567', TO_DATE('07-02-2007', 'dd-MM-yyyy'), 'IT_PROG', 4200, NULL, 103, 60);INSERT INTO employees VALUES ( 108, 'Nancy', 'Greenberg', 'NGREENBE', '515.124.4569', TO_DATE('17-08-2002', 'dd-MM-yyyy'), 'FI_MGR', 12008, NULL, 101, 100);INSERT INTO employees VALUES ( 109, 'Daniel', 'Faviet', 'DFAVIET', '515.124.4169', TO_DATE('16-08-2002', 'dd-MM-yyyy'), 'FI_ACCOUNT', 9000, NULL, 108, 100);INSERT INTO employees VALUES ( 110, 'John', 'Chen', 'JCHEN', '515.124.4269', TO_DATE('28-09-2005', 'dd-MM-yyyy'), 'FI_ACCOUNT', 8200, NULL, 108, 100);INSERT INTO employees VALUES ( 111, 'Ismael', 'Sciarra', 'ISCIARRA', '515.124.4369', TO_DATE('30-09-2005', 'dd-MM-yyyy'), 'FI_ACCOUNT', 7700, NULL, 108, 100);INSERT INTO employees VALUES ( 112, 'Jose Manuel', 'Urman', 'JMURMAN', '515.124.4469', TO_DATE('07-03-2006', 'dd-MM-yyyy'), 'FI_ACCOUNT', 7800, NULL, 108, 100);INSERT INTO employees VALUES ( 113, 'Luis', 'Popp', 'LPOPP', '515.124.4567', TO_DATE('07-12-2007', 'dd-MM-yyyy'), 'FI_ACCOUNT', 6900, NULL, 108, 100);INSERT INTO employees VALUES ( 114, 'Den', 'Raphaely', 'DRAPHEAL', '515.127.4561', TO_DATE('07-12-2002', 'dd-MM-yyyy'), 'PU_MAN', 11000, NULL, 100, 30);INSERT INTO employees VALUES ( 115, 'Alexander', 'Khoo', 'AKHOO', '515.127.4562', TO_DATE('18-05-2003', 'dd-MM-yyyy'), 'PU_CLERK', 3100, NULL, 114, 30);INSERT INTO employees VALUES ( 116, 'Shelli', 'Baida', 'SBAIDA', '515.127.4563', TO_DATE('24-12-2005', 'dd-MM-yyyy'), 'PU_CLERK', 2900, NULL, 114, 30);INSERT INTO employees VALUES ( 117, 'Sigal', 'Tobias', 'STOBIAS', '515.127.4564', TO_DATE('24-07-2005', 'dd-MM-yyyy'), 'PU_CLERK', 2800, NULL, 114, 30);INSERT INTO employees VALUES ( 118, 'Guy', 'Himuro', 'GHIMURO', '515.127.4565', TO_DATE('15-11-2006', 'dd-MM-yyyy'), 'PU_CLERK', 2600, NULL, 114, 30);INSERT INTO employees VALUES ( 119, 'Karen', 'Colmenares', 'KCOLMENA', '515.127.4566', TO_DATE('10-08-2007', 'dd-MM-yyyy'), 'PU_CLERK', 2500, NULL, 114, 30);INSERT INTO employees VALUES ( 120, 'Matthew', 'Weiss', 'MWEISS', '650.123.1234', TO_DATE('18-07-2004', 'dd-MM-yyyy'), 'ST_MAN', 8000, NULL, 100, 50);INSERT INTO employees VALUES ( 121, 'Adam', 'Fripp', 'AFRIPP', '650.123.2234', TO_DATE('10-04-2005', 'dd-MM-yyyy'), 'ST_MAN', 8200, NULL, 100, 50);INSERT INTO employees VALUES ( 122, 'Payam', 'Kaufling', 'PKAUFLIN', '650.123.3234', TO_DATE('01-05-2003', 'dd-MM-yyyy'), 'ST_MAN', 7900, NULL, 100, 50);INSERT INTO employees VALUES ( 123, 'Shanta', 'Vollman', 'SVOLLMAN', '650.123.4234', TO_DATE('10-10-2005', 'dd-MM-yyyy'), 'ST_MAN', 6500, NULL, 100, 50);INSERT INTO employees VALUES ( 124, 'Kevin', 'Mourgos', 'KMOURGOS', '650.123.5234', TO_DATE('16-11-2007', 'dd-MM-yyyy'), 'ST_MAN', 5800, NULL, 100, 50);INSERT INTO employees VALUES ( 125, 'Julia', 'Nayer', 'JNAYER', '650.124.1214', TO_DATE('16-07-2005', 'dd-MM-yyyy'), 'ST_CLERK', 3200, NULL, 120, 50);INSERT INTO employees VALUES ( 126, 'Irene', 'Mikkilineni', 'IMIKKILI', '650.124.1224', TO_DATE('28-09-2006', 'dd-MM-yyyy'), 'ST_CLERK', 2700, NULL, 120, 50);INSERT INTO employees VALUES ( 127, 'James', 'Landry', 'JLANDRY', '650.124.1334', TO_DATE('14-01-2007', 'dd-MM-yyyy'), 'ST_CLERK', 2400, NULL, 120, 50);INSERT INTO employees VALUES ( 128, 'Steven', 'Markle', 'SMARKLE', '650.124.1434', TO_DATE('08-03-2008', 'dd-MM-yyyy'), 'ST_CLERK', 2200, NULL, 120, 50);INSERT INTO employees VALUES ( 129, 'Laura', 'Bissot', 'LBISSOT', '650.124.5234', TO_DATE('20-08-2005', 'dd-MM-yyyy'), 'ST_CLERK', 3300, NULL, 121, 50);INSERT INTO employees VALUES ( 130, 'Mozhe', 'Atkinson', 'MATKINSO', '650.124.6234', TO_DATE('30-10-2005', 'dd-MM-yyyy'), 'ST_CLERK', 2800, NULL, 121, 50);INSERT INTO employees VALUES ( 131, 'James', 'Marlow', 'JAMRLOW', '650.124.7234', TO_DATE('16-02-2005', 'dd-MM-yyyy'), 'ST_CLERK', 2500, NULL, 121, 50);INSERT INTO employees VALUES ( 132, 'TJ', 'Olson', 'TJOLSON', '650.124.8234', TO_DATE('10-04-2007', 'dd-MM-yyyy'), 'ST_CLERK', 2100, NULL, 121, 50);INSERT INTO employees VALUES ( 133, 'Jason', 'Mallin', 'JMALLIN', '650.127.1934', TO_DATE('14-06-2004', 'dd-MM-yyyy'), 'ST_CLERK', 3300, NULL, 122, 50);INSERT INTO employees VALUES ( 134, 'Michael', 'Rogers', 'MROGERS', '650.127.1834', TO_DATE('26-08-2006', 'dd-MM-yyyy'), 'ST_CLERK', 2900, NULL, 122, 50);INSERT INTO employees VALUES ( 135, 'Ki', 'Gee', 'KGEE', '650.127.1734', TO_DATE('12-12-2007', 'dd-MM-yyyy'), 'ST_CLERK', 2400, NULL, 122, 50);INSERT INTO employees VALUES ( 136, 'Hazel', 'Philtanker', 'HPHILTAN', '650.127.1634', TO_DATE('06-02-2008', 'dd-MM-yyyy'), 'ST_CLERK', 2200, NULL, 122, 50);INSERT INTO employees VALUES ( 137, 'Renske', 'Ladwig', 'RLADWIG', '650.121.1234', TO_DATE('14-07-2003', 'dd-MM-yyyy'), 'ST_CLERK', 3600, NULL, 123, 50);INSERT INTO employees VALUES ( 138, 'Stephen', 'Stiles', 'SSTILES', '650.121.2034', TO_DATE('26-10-2005', 'dd-MM-yyyy'), 'ST_CLERK', 3200, NULL, 123, 50);INSERT INTO employees VALUES ( 139, 'John', 'Seo', 'JSEO', '650.121.2019', TO_DATE('12-02-2006', 'dd-MM-yyyy'), 'ST_CLERK', 2700, NULL, 123, 50);INSERT INTO employees VALUES ( 140, 'Joshua', 'Patel', 'JPATEL', '650.121.1834', TO_DATE('06-04-2006', 'dd-MM-yyyy'), 'ST_CLERK', 2500, NULL, 123, 50);INSERT INTO employees VALUES ( 141, 'Trenna', 'Rajs', 'TRAJS', '650.121.8009', TO_DATE('17-10-2003', 'dd-MM-yyyy'), 'ST_CLERK', 3500, NULL, 124, 50);INSERT INTO employees VALUES ( 142, 'Curtis', 'Davies', 'CDAVIES', '650.121.2994', TO_DATE('29-01-2005', 'dd-MM-yyyy'), 'ST_CLERK', 3100, NULL, 124, 50);INSERT INTO employees VALUES ( 143, 'Randall', 'Matos', 'RMATOS', '650.121.2874', TO_DATE('15-03-2006', 'dd-MM-yyyy'), 'ST_CLERK', 2600, NULL, 124, 50);INSERT INTO employees VALUES ( 144, 'Peter', 'Vargas', 'PVARGAS', '650.121.2004', TO_DATE('09-07-2006', 'dd-MM-yyyy'), 'ST_CLERK', 2500, NULL, 124, 50);INSERT INTO employees VALUES ( 145, 'John', 'Russell', 'JRUSSEL', '011.44.1344.429268', TO_DATE('01-10-2004', 'dd-MM-yyyy'), 'SA_MAN', 14000, .4, 100, 80);INSERT INTO employees VALUES ( 146, 'Karen', 'Partners', 'KPARTNER', '011.44.1344.467268', TO_DATE('05-01-2005', 'dd-MM-yyyy'), 'SA_MAN', 13500, .3, 100, 80);INSERT INTO employees VALUES ( 147, 'Alberto', 'Errazuriz', 'AERRAZUR', '011.44.1344.429278', TO_DATE('10-03-2005', 'dd-MM-yyyy'), 'SA_MAN', 12000, .3, 100, 80);INSERT INTO employees VALUES ( 148, 'Gerald', 'Cambrault', 'GCAMBRAU', '011.44.1344.619268', TO_DATE('15-10-2007', 'dd-MM-yyyy'), 'SA_MAN', 11000, .3, 100, 80);INSERT INTO employees VALUES ( 149, 'Eleni', 'Zlotkey', 'EZLOTKEY', '011.44.1344.429018', TO_DATE('29-01-2008', 'dd-MM-yyyy'), 'SA_MAN', 10500, .2, 100, 80);INSERT INTO employees VALUES ( 150, 'Peter', 'Tucker', 'PTUCKER', '011.44.1344.129268', TO_DATE('30-01-2005', 'dd-MM-yyyy'), 'SA_REP', 10000, .3, 145, 80);INSERT INTO employees VALUES ( 151, 'David', 'Bernstein', 'DBERNSTE', '011.44.1344.345268', TO_DATE('24-03-2005', 'dd-MM-yyyy'), 'SA_REP', 9500, .25, 145, 80);INSERT INTO employees VALUES ( 152, 'Peter', 'Hall', 'PHALL', '011.44.1344.478968', TO_DATE('20-08-2005', 'dd-MM-yyyy'), 'SA_REP', 9000, .25, 145, 80);INSERT INTO employees VALUES ( 153, 'Christopher', 'Olsen', 'COLSEN', '011.44.1344.498718', TO_DATE('30-03-2006', 'dd-MM-yyyy'), 'SA_REP', 8000, .2, 145, 80);INSERT INTO employees VALUES ( 154, 'Nanette', 'Cambrault', 'NCAMBRAU', '011.44.1344.987668', TO_DATE('09-12-2006', 'dd-MM-yyyy'), 'SA_REP', 7500, .2, 145, 80);INSERT INTO employees VALUES ( 155, 'Oliver', 'Tuvault', 'OTUVAULT', '011.44.1344.486508', TO_DATE('23-11-2007', 'dd-MM-yyyy'), 'SA_REP', 7000, .15, 145, 80);INSERT INTO employees VALUES ( 156, 'Janette', 'King', 'JKING', '011.44.1345.429268', TO_DATE('30-01-2004', 'dd-MM-yyyy'), 'SA_REP', 10000, .35, 146, 80);INSERT INTO employees VALUES ( 157, 'Patrick', 'Sully', 'PSULLY', '011.44.1345.929268', TO_DATE('04-03-2004', 'dd-MM-yyyy'), 'SA_REP', 9500, .35, 146, 80);INSERT INTO employees VALUES ( 158, 'Allan', 'McEwen', 'AMCEWEN', '011.44.1345.829268', TO_DATE('01-08-2004', 'dd-MM-yyyy'), 'SA_REP', 9000, .35, 146, 80);INSERT INTO employees VALUES ( 159, 'Lindsey', 'Smith', 'LSMITH', '011.44.1345.729268', TO_DATE('10-03-2005', 'dd-MM-yyyy'), 'SA_REP', 8000, .3, 146, 80);INSERT INTO employees VALUES ( 160, 'Louise', 'Doran', 'LDORAN', '011.44.1345.629268', TO_DATE('15-12-2005', 'dd-MM-yyyy'), 'SA_REP', 7500, .3, 146, 80);INSERT INTO employees VALUES ( 161, 'Sarath', 'Sewall', 'SSEWALL', '011.44.1345.529268', TO_DATE('03-11-2006', 'dd-MM-yyyy'), 'SA_REP', 7000, .25, 146, 80);INSERT INTO employees VALUES ( 162, 'Clara', 'Vishney', 'CVISHNEY', '011.44.1346.129268', TO_DATE('11-11-2005', 'dd-MM-yyyy'), 'SA_REP', 10500, .25, 147, 80);INSERT INTO employees VALUES ( 163, 'Danielle', 'Greene', 'DGREENE', '011.44.1346.229268', TO_DATE('19-03-2007', 'dd-MM-yyyy'), 'SA_REP', 9500, .15, 147, 80);INSERT INTO employees VALUES ( 164, 'Mattea', 'Marvins', 'MMARVINS', '011.44.1346.329268', TO_DATE('24-01-2008', 'dd-MM-yyyy'), 'SA_REP', 7200, .10, 147, 80);INSERT INTO employees VALUES ( 165, 'David', 'Lee', 'DLEE', '011.44.1346.529268', TO_DATE('23-02-2008', 'dd-MM-yyyy'), 'SA_REP', 6800, .1, 147, 80);INSERT INTO employees VALUES ( 166, 'Sundar', 'Ande', 'SANDE', '011.44.1346.629268', TO_DATE('24-03-2008', 'dd-MM-yyyy'), 'SA_REP', 6400, .10, 147, 80);INSERT INTO employees VALUES ( 167, 'Amit', 'Banda', 'ABANDA', '011.44.1346.729268', TO_DATE('21-04-2008', 'dd-MM-yyyy'), 'SA_REP', 6200, .10, 147, 80);INSERT INTO employees VALUES ( 168, 'Lisa', 'Ozer', 'LOZER', '011.44.1343.929268', TO_DATE('11-03-2005', 'dd-MM-yyyy'), 'SA_REP', 11500, .25, 148, 80);INSERT INTO employees VALUES ( 169 , 'Harrison', 'Bloom', 'HBLOOM', '011.44.1343.829268', TO_DATE('23-03-2006', 'dd-MM-yyyy'), 'SA_REP', 10000, .20, 148, 80);INSERT INTO employees VALUES ( 170, 'Tayler', 'Fox', 'TFOX', '011.44.1343.729268', TO_DATE('24-01-2006', 'dd-MM-yyyy'), 'SA_REP', 9600, .20, 148, 80);INSERT INTO employees VALUES ( 171, 'William', 'Smith', 'WSMITH', '011.44.1343.629268', TO_DATE('23-02-2007', 'dd-MM-yyyy'), 'SA_REP', 7400, .15, 148, 80);INSERT INTO employees VALUES ( 172, 'Elizabeth', 'Bates', 'EBATES', '011.44.1343.529268', TO_DATE('24-03-2007', 'dd-MM-yyyy'), 'SA_REP', 7300, .15, 148, 80);INSERT INTO employees VALUES ( 173, 'Sundita', 'Kumar', 'SKUMAR', '011.44.1343.329268', TO_DATE('21-04-2008', 'dd-MM-yyyy'), 'SA_REP', 6100, .10, 148, 80);INSERT INTO employees VALUES ( 174, 'Ellen', 'Abel', 'EABEL', '011.44.1644.429267', TO_DATE('11-05-2004', 'dd-MM-yyyy'), 'SA_REP', 11000, .30, 149, 80);INSERT INTO employees VALUES ( 175, 'Alyssa', 'Hutton', 'AHUTTON', '011.44.1644.429266', TO_DATE('19-03-2005', 'dd-MM-yyyy'), 'SA_REP', 8800, .25, 149, 80);INSERT INTO employees VALUES ( 176, 'Jonathon', 'Taylor', 'JTAYLOR', '011.44.1644.429265', TO_DATE('24-03-2006', 'dd-MM-yyyy'), 'SA_REP', 8600, .20, 149, 80);INSERT INTO employees VALUES ( 177, 'Jack', 'Livingston', 'JLIVINGS', '011.44.1644.429264', TO_DATE('23-04-2006', 'dd-MM-yyyy'), 'SA_REP', 8400, .20, 149, 80);INSERT INTO employees VALUES ( 178, 'Kimberely', 'Grant', 'KGRANT', '011.44.1644.429263', TO_DATE('24-05-2007', 'dd-MM-yyyy'), 'SA_REP', 7000, .15, 149, NULL);INSERT INTO employees VALUES ( 179, 'Charles', 'Johnson', 'CJOHNSON', '011.44.1644.429262', TO_DATE('04-01-2008', 'dd-MM-yyyy'), 'SA_REP', 6200, .10, 149, 80);INSERT INTO employees VALUES ( 180, 'Winston', 'Taylor', 'WTAYLOR', '650.507.9876', TO_DATE('24-01-2006', 'dd-MM-yyyy'), 'SH_CLERK', 3200, NULL, 120, 50);INSERT INTO employees VALUES ( 181, 'Jean', 'Fleaur', 'JFLEAUR', '650.507.9877', TO_DATE('23-02-2006', 'dd-MM-yyyy'), 'SH_CLERK', 3100, NULL, 120, 50);INSERT INTO employees VALUES ( 182, 'Martha', 'Sullivan', 'MSULLIVA', '650.507.9878', TO_DATE('21-06-2007', 'dd-MM-yyyy'), 'SH_CLERK', 2500, NULL, 120, 50);INSERT INTO employees VALUES ( 183, 'Girard', 'Geoni', 'GGEONI', '650.507.9879', TO_DATE('03-02-2008', 'dd-MM-yyyy'), 'SH_CLERK', 2800, NULL, 120, 50);INSERT INTO employees VALUES ( 184, 'Nandita', 'Sarchand', 'NSARCHAN', '650.509.1876', TO_DATE('27-01-2004', 'dd-MM-yyyy'), 'SH_CLERK', 4200, NULL, 121, 50);INSERT INTO employees VALUES ( 185, 'Alexis', 'Bull', 'ABULL', '650.509.2876', TO_DATE('20-02-2005', 'dd-MM-yyyy'), 'SH_CLERK', 4100, NULL, 121, 50);INSERT INTO employees VALUES ( 186, 'Julia', 'Dellinger', 'JDELLING', '650.509.3876', TO_DATE('24-06-2006', 'dd-MM-yyyy'), 'SH_CLERK', 3400, NULL, 121, 50);INSERT INTO employees VALUES ( 187, 'Anthony', 'Cabrio', 'ACABRIO', '650.509.4876', TO_DATE('07-02-2007', 'dd-MM-yyyy'), 'SH_CLERK', 3000, NULL, 121, 50);INSERT INTO employees VALUES ( 188, 'Kelly', 'Chung', 'KCHUNG', '650.505.1876', TO_DATE('14-06-2005', 'dd-MM-yyyy'), 'SH_CLERK', 3800, NULL, 122, 50);INSERT INTO employees VALUES ( 189, 'Jennifer', 'Dilly', 'JDILLY', '650.505.2876', TO_DATE('13-08-2005', 'dd-MM-yyyy'), 'SH_CLERK', 3600, NULL, 122, 50);INSERT INTO employees VALUES ( 190, 'Timothy', 'Gates', 'TGATES', '650.505.3876', TO_DATE('11-07-2006', 'dd-MM-yyyy'), 'SH_CLERK', 2900, NULL, 122, 50);INSERT INTO employees VALUES ( 191, 'Randall', 'Perkins', 'RPERKINS', '650.505.4876', TO_DATE('19-12-2007', 'dd-MM-yyyy'), 'SH_CLERK', 2500, NULL, 122, 50);INSERT INTO employees VALUES ( 192, 'Sarah', 'Bell', 'SBELL', '650.501.1876', TO_DATE('04-02-2004', 'dd-MM-yyyy'), 'SH_CLERK', 4000, NULL, 123, 50);INSERT INTO employees VALUES ( 193, 'Britney', 'Everett', 'BEVERETT', '650.501.2876', TO_DATE('03-03-2005', 'dd-MM-yyyy'), 'SH_CLERK', 3900, NULL, 123, 50);INSERT INTO employees VALUES ( 194, 'Samuel', 'McCain', 'SMCCAIN', '650.501.3876', TO_DATE('01-07-2006', 'dd-MM-yyyy'), 'SH_CLERK', 3200, NULL, 123, 50);INSERT INTO employees VALUES ( 195, 'Vance', 'Jones', 'VJONES', '650.501.4876', TO_DATE('17-03-2007', 'dd-MM-yyyy'), 'SH_CLERK', 2800, NULL, 123, 50);INSERT INTO employees VALUES ( 196, 'Alana', 'Walsh', 'AWALSH', '650.507.9811', TO_DATE('24-04-2006', 'dd-MM-yyyy'), 'SH_CLERK', 3100, NULL, 124, 50);INSERT INTO employees VALUES ( 197, 'Kevin', 'Feeney', 'KFEENEY', '650.507.9822', TO_DATE('23-05-2006', 'dd-MM-yyyy'), 'SH_CLERK', 3000, NULL, 124, 50);INSERT INTO employees VALUES ( 198, 'Donald', 'OConnell', 'DOCONNEL', '650.507.9833', TO_DATE('21-06-2007', 'dd-MM-yyyy'), 'SH_CLERK', 2600, NULL, 124, 50);INSERT INTO employees VALUES ( 199, 'Douglas', 'Grant', 'DGRANT', '650.507.9844', TO_DATE('13-01-2008', 'dd-MM-yyyy'), 'SH_CLERK', 2600, NULL, 124, 50);INSERT INTO employees VALUES ( 200, 'Jennifer', 'Whalen', 'JWHALEN', '515.123.4444', TO_DATE('17-09-2003', 'dd-MM-yyyy'), 'AD_ASST', 4400, NULL, 101, 10);INSERT INTO employees VALUES ( 201, 'Michael', 'Hartstein', 'MHARTSTE', '515.123.5555', TO_DATE('17-02-2004', 'dd-MM-yyyy'), 'MK_MAN', 13000, NULL, 100, 20);INSERT INTO employees VALUES ( 202, 'Pat', 'Fay', 'PFAY', '603.123.6666', TO_DATE('17-08-2005', 'dd-MM-yyyy'), 'MK_REP', 6000, NULL, 201, 20);INSERT INTO employees VALUES ( 203, 'Susan', 'Mavris', 'SMAVRIS', '515.123.7777', TO_DATE('07-06-2002', 'dd-MM-yyyy'), 'HR_REP', 6500, NULL, 101, 40);INSERT INTO employees VALUES ( 204, 'Hermann', 'Baer', 'HBAER', '515.123.8888', TO_DATE('07-06-2002', 'dd-MM-yyyy'), 'PR_REP', 10000, NULL, 101, 70);INSERT INTO employees VALUES ( 205, 'Shelley', 'Higgins', 'SHIGGINS', '515.123.8080', TO_DATE('07-06-2002', 'dd-MM-yyyy'), 'AC_MGR', 12008, NULL, 101, 110);INSERT INTO employees VALUES ( 206, 'William', 'Gietz', 'WGIETZ', '515.123.8181', TO_DATE('07-06-2002', 'dd-MM-yyyy'), 'AC_ACCOUNT', 8300, NULL, 205, 110);
COMMIT;ALTER TABLE departments ALTER CONSTRAINT dept_mgr_fk NOT DEFERRABLE INITIALLY IMMEDIATE;
创建索引
CREATE INDEX emp_department_ix ON employees (department_id);CREATE INDEX emp_job_ix ON employees (job_id);CREATE INDEX emp_manager_ix ON employees (manager_id);CREATE INDEX emp_name_ix ON employees (last_name, first_name);CREATE INDEX dept_location_ix ON departments (location_id);
删除表
DROP VIEW emp_details_view;
DROP TABLE departments CASCADE;
DROP TABLE jobs CASCADE;
DROP TABLE employees CASCADE;
postgresql命令速查
postgresql命令速查
简单查询
/*
注释：作者 jane
时间 2023/08/17
*/
select first_name,last_name
from employees ;
计算查询结果
select 1+1 as sumResult;
SQL使用SELECT和FROM查询表中的数据，
*表示查询全部字段；
PostgreSQL提供了无表查询的扩展，使用AS指定别名；
使用DISTINCT去除查询结果中的重复值；
PostgreSQL支持两种格式的代码注释。
利用查询条件过滤数据
PostgreSQL使用WHERE子句过滤表中的数据；
PostgreSQL提供了以下比较运算符：=、！=、 BETWEEN、IN等。
模糊查询
-- sh sa-- %任意多个字符-- _任意一个字符select first_namefrom employeeswhere first_name like 'S_%';
create table t_like (v TeXT);insert into t_like(v) values ('进度 25%已完成');
insert into t_like(v) values ('日期：2022年6月25日。');select * from t_like;-- 查询包含25%的字符串
-- escape转义#后的字符
select * from t_like where v like '%25#%%' escape '#';
-- 也可以使用\进行转义，效果和escape一样
select * from t_like where v like '%25\%%';
