9.合并school和school_count数据为schooL_info,并更改'Name'列列名为'Count'。

如果你已经得到了`school_count` DataFrame，并且它包含了学校名称（可能是原名'School'或'学校'），你可以使用`merge`或`join`函数将它与原来的'school'数据集合并起来。假设两列用于连接的字段都是'school'或'学校'：

if '学校' in school.columns and '学校' in school_count.columns:  # 检查列是否存在
    schooL_info = pd.merge(school, school_count, on='学校', how='inner')  # 合并两个数据框
    schooL_info.rename(columns={'学校': 'Name', '学生人数': 'Count'}, inplace=True)  # 改名
else:
    print("无法找到相同的列名用于合并，检查一下列名是否正确。")

schooL_info  # 显示合并后的数据

这将会创建一个新的DataFrame `schooL_info`，其中包含了原始的学校信息加上每个学校的计数。

相关问题

如何在 这段储存过程中加分页 create PROCEDURE [dbo].[Z_SelfHelpOrderingQuery] @CorpId varchar(20), @EnCode varchar(20), @MealTypeId varchar(20), @AreaId varchar(20), @CheackMark varchar(20), @MenuName varchar(20), @Start varchar(20), @End varchar(20), @MenuCode varchar(20), @BilltypeId varchar(20) AS begin if (@CheackMark = 1) BEGIN select A.MenuId as id, CONVERT(varchar(10), A.MenuDate, 120) as MenuDate, CONVERT(varchar(10), A.SalesDate, 120) as SalesDate, A.MenuCode, A.MealType, A.MenuName, A.CheackMark, A.ShortName, A.BilltypeId, A.CreateUserId, A.MenuCycleId, A.EnCode, A.MealTypeId,B.AreaId,A.CreateUserName,A.ModifyUserName from YE_School_Menu A WITH(NOLOCK) left join YE_Client_Customer B WITH(NOLOCK) on A.CorpId=B.CorpId And B.EnabledMark=1 and A.EnCode=B.EnCode where A.CorpId=@CorpId and A.MenuCode like @MenuCode and A.CheackMark=@CheackMark and A.BilltypeId=@BilltypeId and A.MealTypeId like @MealTypeId and A.MenuName like @MenuName and A.MenuDate >= @Start and A.MenuDate<=@End and B.AreaId like @AreaId and A.EnCode like @EnCode group by A.MenuId,A.MenuDate,A.MenuCode,A.MealType,A.MenuName,A.CheackMark,A.SalesDate,A.ShortName,A.CreateUserId,A.MenuCycleId,A.EnCode,A.MealTypeId,A.BilltypeId ,B.AreaId,A.CreateUserName,A.ModifyUserName order by A.MenuDate,A.ShortName,A.MealTypeId,A.MenuName,A.SalesDate END select A.MenuId as id, CONVERT(varchar(10), A.MenuDate, 120) as MenuDate, CONVERT(varchar(10), A.SalesDate, 120) as SalesDate, A.MenuCode, A.MealType, A.MenuName, A.CheackMark, A.ShortName, A.BilltypeId, A.CreateUserId, A.MenuCycleId, A.EnCode, A.MealTypeId,B.AreaId,A.CreateUserName,A.ModifyUserName from YE_School_Menu A WITH(NOLOCK) left join YE_Client_Customer B WITH(NOLOCK) on A.CorpId=B.CorpId And B.EnabledMark=1 and A.EnCode=B.EnCode where A.CorpId=@CorpId and A.MenuCode like @MenuCode and A.BilltypeId=@BilltypeId and A.MealTypeId like @MealTypeId and A.MenuName like @MenuName and A.MenuDate >= @Start and A.MenuDate<=@End and B.AreaId like @AreaId and A.EnCode like @EnCode group by A.MenuId,A.MenuDate,A.MenuCode,A.MealType,A.MenuName,A.CheackMark,A.SalesDate,A.ShortName,A.CreateUserId,A.MenuCycleId,A.EnCode,A.MealTypeId,A.BilltypeId ,B.AreaId,A.CreateUserName,A.ModifyUserName order by A.MenuDate,A.ShortName,A.MealTypeId,A.MenuName,A.SalesDate

以下是在存储过程中添加分页的示例代码：

CREATE PROCEDURE [dbo].[Z_SelfHelpOrderingQuery]
    @CorpId varchar(20),
    @EnCode varchar(20),
    @MealTypeId varchar(20),
    @AreaId varchar(20),
    @CheackMark varchar(20),
    @MenuName varchar(20),
    @Start varchar(20),
    @End varchar(20),
    @MenuCode varchar(20),
    @BilltypeId varchar(20),
    @PageNumber INT,
    @PageSize INT
AS
BEGIN
    SET NOCOUNT ON;

    DECLARE @Offset INT = (@PageNumber - 1) * @PageSize;

    -- First query for getting total records
    DECLARE @TotalRecords INT;
    SELECT @TotalRecords = COUNT(*) FROM YE_School_Menu WITH(NOLOCK)
        LEFT JOIN YE_Client_Customer WITH(NOLOCK) ON YE_School_Menu.CorpId=YE_Client_Customer.CorpId AND YE_School_Menu.EnCode=YE_Client_Customer.EnCode
        WHERE YE_School_Menu.CorpId=@CorpId AND YE_School_Menu.MenuCode LIKE @MenuCode AND YE_School_Menu.BilltypeId=@BilltypeId AND YE_School_Menu.MealTypeId LIKE @MealTypeId AND YE_School_Menu.MenuName LIKE @MenuName AND YE_School_Menu.MenuDate >= @Start AND YE_School_Menu.MenuDate <= @End AND YE_Client_Customer.AreaId LIKE @AreaId AND YE_School_Menu.EnCode LIKE @EnCode AND YE_School_Menu.CheackMark=@CheackMark AND YE_Client_Customer.EnabledMark=1;

    -- Second query for getting paged data
    SELECT *
    FROM (
        SELECT ROW_NUMBER() OVER (ORDER BY YE_School_Menu.MenuDate, YE_School_Menu.ShortName, YE_School_Menu.MealTypeId, YE_School_Menu.MenuName, YE_School_Menu.SalesDate) AS RowNum,
            YE_School_Menu.MenuId AS id,
            CONVERT(varchar(10), YE_School_Menu.MenuDate, 120) AS MenuDate,
            CONVERT(varchar(10), YE_School_Menu.SalesDate, 120) AS SalesDate,
            YE_School_Menu.MenuCode,
            YE_School_Menu.MealType,
            YE_School_Menu.MenuName,
            YE_School_Menu.CheackMark,
            YE_School_Menu.ShortName,
            YE_School_Menu.BilltypeId,
            YE_School_Menu.CreateUserId,
            YE_School_Menu.MenuCycleId,
            YE_School_Menu.EnCode,
            YE_School_Menu.MealTypeId,
            YE_Client_Customer.AreaId,
            YE_School_Menu.CreateUserName,
            YE_School_Menu.ModifyUserName
        FROM YE_School_Menu WITH(NOLOCK)
        LEFT JOIN YE_Client_Customer WITH(NOLOCK) ON YE_School_Menu.CorpId=YE_Client_Customer.CorpId AND YE_School_Menu.EnCode=YE_Client_Customer.EnCode
        WHERE YE_School_Menu.CorpId=@CorpId AND YE_School_Menu.MenuCode LIKE @MenuCode AND YE_School_Menu.BilltypeId=@BilltypeId AND YE_School_Menu.MealTypeId LIKE @MealTypeId AND YE_School_Menu.MenuName LIKE @MenuName AND YE_School_Menu.MenuDate >= @Start AND YE_School_Menu.MenuDate <= @End AND YE_Client_Customer.AreaId LIKE @AreaId AND YE_School_Menu.EnCode LIKE @EnCode AND YE_School_Menu.CheackMark=@CheackMark AND YE_Client_Customer.EnabledMark=1
    ) AS PaginatedData
    WHERE PaginatedData.RowNum > @Offset AND PaginatedData.RowNum <= (@Offset + @PageSize)
    ORDER BY PaginatedData.MenuDate, PaginatedData.ShortName, PaginatedData.MealTypeId, PaginatedData.MenuName, PaginatedData.SalesDate;

    -- Third query for getting total pages
    DECLARE @TotalPages INT = CEILING(CAST(@TotalRecords AS FLOAT) / @PageSize);
    SELECT @TotalPages AS TotalPages;
END

在调用存储过程时，传入页码和每页记录数参数即可获取指定页码的数据。例如：

EXEC Z_SelfHelpOrderingQuery @CorpId='1', @EnCode='', @MealTypeId='', @AreaId='', @CheackMark='1', @MenuName='', @Start='2022-01-01', @End='2022-12-31', @MenuCode='', @BilltypeId='1', @PageNumber=1, @PageSize=10;

以上示例中，@PageNumber=1 表示获取第一页的数据，@PageSize=10 表示每页显示 10 条记录。

使用sqlyog创建school数据库，包括每张表及表的列，同时利用统计语句查询导入文本数据后每张表的行数

使用SQLyog创建名为"school"的数据库，首先需要登录到SQLyog界面并连接到MySQL服务器。以下是创建数据库和表的基本步骤：

1. **创建数据库**:
在工具中运行以下命令：

   CREATE DATABASE school;

这会在MySQL服务器上创建一个新的数据库叫作'school'。

2. **选择数据库**:
在SQLyog的导航面板，选择刚创建的'school'数据库。

3. **创建表**:
我们可以创建一个简单的示例，例如学生信息表（students）、教师信息表（teachers），以及课程表（courses）。以下是创建这些表的SQL语句：

- 学生表 (students)：

     CREATE TABLE students (
       id INT PRIMARY KEY,
       name VARCHAR(50),
       age INT,
       class_id INT,
       FOREIGN KEY (class_id) REFERENCES classes(id)
     );

- 教师表 (teachers)：

     CREATE TABLE teachers (
       id INT PRIMARY KEY,
       name VARCHAR(50),
       subject VARCHAR(50),
       class_id INT,
       FOREIGN KEY (class_id) REFERENCES classes(id)
     );
   - 课程表 (classes)：

CREATE TABLE classes (
id INT PRIMARY KEY,
name VARCHAR(50),
semester INT
);

4. **导入文本数据**:
   使用`LOAD DATA INFILE`命令从CSV文件导入数据，这里假设文件名分别是'students.csv', 'teachers.csv', 和'classes.csv'：

LOAD DATA LOCAL INFILE 'students.csv' INTO TABLE students;
LOAD DATA LOCAL INFILE 'teachers.csv' INTO TABLE teachers;
LOAD DATA LOCAL INFILE 'classes.csv' INTO TABLE classes;

   确保文件路径正确，并且数据格式与表结构匹配。

5. **查询表的行数**:
   要获取每个表的行数，使用`COUNT(*)`函数：

SELECT COUNT(*) FROM students;
SELECT COUNT(*) FROM teachers;
SELECT COUNT(*) FROM classes;