选择：select * from table1 where 范围 插入：insert into table1(field1,field2) values(value1,value2) 删除：delete from table1 where 范围 更新：update table1 set field1=value1 where 范围 查找：select * from table1 where field1 like ’%value1%’ ---like的语法很精妙，查资料! 排序：select
选择：select * from table1 where 范围插入：insert into table1(field1,field2) values(value1,value2)删除：delete from table1 where 范围更新：update table1 set field1=value1 where 范围查找：select * from table1 where field1 like ’%value1%’ ---like的语法很精妙，查资料!排序：select * fro
10、说明：几个简单的基本的sql语句 选择：select * from table1 where 范围 插入：insert into table1(field1,field2) values(value1,value2) 删除：delete from table1 where 范围 更新：update table1 set field1=value1 where 范围 查找：select * from table1 where field1 like ’%value1%’
SELECT 列 FROM 表 WHERE 条件 选择：select * from table where 范围 2 插入：insert into table(field1,field2) values(value1,value2) 3 删除：delete from table where 范围 4 更新：update table set field1=value1 where 范围 5 查找：select * from table where field1 like ’%value1%’ 6
Pandas是一个非常好用的工具，可以用来处理各种格式的数据，本文主要介绍Pandas中的四种选择数据的方法：
简单的筛选类型有四种，按照标签索引、元素位置以及综合筛选，具体如下：
#select by label : loc
#select by position : iloc
#mixed selection : ix
#使用判断
建立一个DataFrame表，程序如下：
<<<
import pandas as pd
import numpy as np
