Welcome to MySQL Workbench:MySQL正規表示式

正規表示式：
MySQL 同樣也支援其他正規表示式的匹配， MySQL中使用 REGEXP 操作符來進行正規表示式匹配。
如果您瞭解PHP或Perl，那麼操作起來就非常簡單，因為MySQL的正規表示式匹配與這些指令碼的類似。

CREATE TABLE test_NO1(
test_NO1_id INT NOT NULL AUTO_INCREMENT,
test_NO1_title VARCHAR(100) NOT NULL,
test_NO1_author VARCHAR(40) NOT NULL,
test_NO1_date DATE,
PRIMARY KEY ( test_NO1_id )
)ENGINE=InnoDB;

drop table test_no1;


INSERT INTO test_NO1 
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb", "welcome to programb", NOW());
    
    
select * from test_NO1;


INSERT INTO test_NO1 
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb2", "welcome to programb2", NOW());
    
INSERT INTO test_NO1 
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb3", "welcome to programb3", NOW());
    
    

SELECT * from test_NO1  WHERE test_NO1_title='programb2';

SELECT * from test_NO1;

update test_NO1 SET test_NO1_title='programb100' WHERE test_NO1_id=1;

SELECT * from test_NO1 where test_NO1_id=1;

SELECT * from test_NO1;

DELETE FROM test_NO1 WHERE test_NO1_id=1;

SELECT * from test_NO1;

 SELECT * from test_NO1  WHERE test_NO1_title LIKE '%programb2';
 
 INSERT INTO test_NO1 
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb2", "welcome.to.programb2", NOW());
 
 SELECT * from test_NO1  WHERE test_NO1_author LIKE '%programb2';
 
 SELECT * from test_NO1  WHERE test_NO1_author LIKE '%to%';
 
 SELECT * from test_NO1  WHERE test_NO1_author LIKE 'welcome%';
 
 SELECT * from test_NO1;
 
 CREATE TABLE test_NO2(
test_NO1_id INT NOT NULL AUTO_INCREMENT,
test_NO1_title VARCHAR(100) NOT NULL,
test_NO1_author VARCHAR(40) NOT NULL,
test_NO1_date DATE,
PRIMARY KEY ( test_NO1_id )
)ENGINE=InnoDB;

 INSERT INTO test_NO2
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb2", "welcome.to.programb2", NOW());
    
 SELECT * from test_NO2;
 
 SELECT test_NO1_author FROM test_no1
 UNION
 SELECT test_NO1_author FROM test_no2
 ORDER BY test_NO1_author; 
 
  SELECT test_NO1_author FROM test_no1
 UNION all
 SELECT test_NO1_author FROM test_no2
 ORDER BY test_NO1_author; 
 
 
select * from test_no1 order by test_NO1_date asc;

INSERT INTO test_NO1 
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb4", "welcome to programb4", NOW());
    
INSERT INTO test_NO1 
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb5", "welcome to programb5", NOW());
    
select * from test_no1 order by test_NO1_date asc;

select * from test_no1 order by test_NO1_date desc;

select test_NO1_title, count(*) from test_no1 group by test_NO1_title;

select test_NO1_title, sum(test_NO1_id)  from test_no1 group by test_NO1_title;

select test_NO1_title, avg(test_NO1_id)  from test_no1 group by test_NO1_title;

SELECT * from test_NO1;

SELECT * from test_no2;

INSERT INTO test_NO2 
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb4", "welcome to programb4", NOW());
    
INSERT INTO test_NO2 
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb2", "welcome to programb2", NOW());
    
SELECT * from test_no2;

select t1.test_NO1_title, t2.test_NO1_date from test_no1 t1, test_no2 t2 where t1.test_NO1_date=t2.test_NO1_date;

select t1.test_NO1_title, t2.test_NO1_date from test_no1 t1 left join test_no2 t2 on t1.test_NO1_date=t2.test_NO1_date;

select t1.test_NO1_title, t2.test_NO1_date from test_no1 t1 right join test_no2 t2 on t1.test_NO1_date=t2.test_NO1_date;


SELECT * from test_no2;

INSERT INTO test_NO2 
    (test_NO1_title, test_NO1_author, test_NO1_date )
    VALUES
    ("programb2", "welcome", NOW());

SELECT * from test_no2;

select * from test_no2 where test_NO1_author is null;


INSERT INTO test_NO2 
    (test_NO1_title, test_NO1_author )
    VALUES
    ("programb2", "welcome");

INSERT INTO test_NO2 
    (test_NO1_title, test_NO1_author )
    VALUES
    ("programb2", "welcome");

INSERT INTO test_NO2 
    (test_NO1_title, test_NO1_author )
    VALUES
    ("programb2", "welcome");

SELECT * from test_no2;

select * from test_no2 where test_NO1_date is null;

select * from test_no2 where test_NO1_date is not null;

select * from test_no1 where test_NO1_title regexp '^pro';

select * from test_no1 where test_NO1_title regexp '2$';

select * from test_no1 where test_NO1_title regexp 'gra';

select * from test_no1 where test_NO1_title regexp '^[pro]|5$';

select * from test_no1 where test_NO1_title regexp '^pro';

select * from test_no1 where test_NO1_title regexp '2$';

select * from test_no1 where test_NO1_title regexp 'gra';

select * from test_no1 where test_NO1_title regexp '^[pro]|5$';