增

　　insert into tb1(name,age) values(‘alex‘,12),(‘egg‘,18);

　　insert into tb2(name,age) select name,age from tb1;

刪

　　delete from tb1 where id>2 and name=‘alex‘

改

　　update tb2 set name=‘alex‘,age=19 where id>12 and name=‘xx‘

查

　　select * from tb1;

　　select id,name from tb1;

　　select id,name from tb1 where id>12 or name=‘alex‘;

　　select id,name as cname from tb1 where id>12 or name=‘alex‘;

　　select name,age,11 from tb2　　# 11是常量

　　select * from tb1 where id in (1,2,3);

　　select * from tb1 where id not in (1,2,3);

　　select * from tb1 where id between 1 and 5;　　# 閉區間

　　select * from tb1 where id in (select nid from 表);　　# 先執行括號語句

通配符：

　　select * from tb1 where name like "a%";　　# 後續任意字符

　　select * from tb1 where name like "a_";　　# 後續一個字符

分頁：

　　select * from tb1 limit 10;　　# 前10項

　　select * from tb1 limit 0,10;　　#從0項開始前10項

　　select * from tb1 limit 10,10;

　　select * from tb1 limit 10 offset 20;　　# 從20開始前10項

排序：

　　select * from tb1 order by

　　select * from tb1 order by id desc;

　　取後10條數據

　　select * from tb1 order by id desc limit 10;

python學習筆記(71) SQL語句數據行操作補充