Welcome to MySQL Workbench:LIKE子句

LIKE子句：

SQL SELECT 语句使用 LIKE 子句从数据表中读取数据的通用语法。
WHERE 子句中指定任何条件。
WHERE 子句中使用LIKE子句。
LIKE子句代替等号 =。
LIKE 通常与 % 一同使用，类似于一个元字符的搜索。
AND 或者 OR 指定一个或多个条件。
DELETE 或 UPDATE 命令中使用 WHERE…LIKE 子句来指定条件。

 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%';

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;