1. Read data
select * from tb1; select count(*) from tb1; #获取数据库条数 count(1)效果相同，效率更高
2. Insert data
INSERT INTO table_name ( field1, field2,...fieldN ) VALUES ( value1, value2,...valueN );
3. Update data
UPDATA tb1 SET name='li' where id=3; UPDATA tb1 SET name=default where id=2; #将名字赋予默认值
4. Delete data
DELETE FROM tb1 where id=1;
5. Where condition query
select * where name='luo'; select * where BINARY name ='luo'; //数据库默认是不区分大小写的 用 BINARY来强调大小写
6. Like combined with regular expressions to query
SELECT * from tbl WHERE name LIKE '%o'; 查找所有名字由 o 结尾的记录
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