从多个表中为 1 个特定用户选择数据

Question

所以我的数据库由 5 个 table 组成，每个数据库都有不同的列。使它们全部标识的唯一列是 id。我正在尝试获取特定用户的数据，但我似乎只获取了数据库的所有用户。

这是我试过的：

SELECT
    ControlAccess.UserName,
    ControlAccess.Pass,
    Users.First_Name,
    Users.Last_Name, 
    UserInfo.Age, 
    UserInfo.Country,
    UserInfo.Address,
    UserInfo.ZipCode,
    Sessions.Matrix1,
    Sessions.Matrix2,
    Sessions.Result,
    Operations.Operation,
    FilePath.LocationFiles
FROM 
    MatrixUsers.UserInfo
INNER JOIN 
    MatrixUsers.Users
ON 
    UserInfo.idUserInfo = Users.idUsers = 1
INNER JOIN 
    MatrixUsers.ControlAccess
ON 
    ControlAccess.idControlAccess = UserInfo.idUserInfo = 1
INNER JOIN 
    MatrixUsers.Sessions
ON 
    Sessions.idSessions = ControlAccess.idControlAccess = 1
INNER JOIN 
    MatrixUsers.FilePath
ON 
    FilePath.idFilePath = Sessions.idSessions = 1
INNER JOIN 
    MatrixUsers.Operations
ON 
    Operations.idOperations = FilePath.idFilePath = 1;

我尝试将 1 放在每个 id 的末尾以查看它们是否匹配，但我仍然获得了所有用户。

我是 SQL 的新手，我只熟悉匹配行，但不熟悉特定行。

以下是每个 table 的列：

ControlAccess: {idControlAccess, UserName, Pass}
Sessions: {idSessions, Matrix1, Matrix2, Result}
FilePath: {idFilePath, LocationFiles}
Operations: {idOperation, Operation}
UserInfo: {idUserInfo, Age, Country, Address, ZipCode, Phone}

Answer 1

需要特定用户时使用 WHERE。例如，select user_id 来自 table 其中 user_id=the_specific_user_id 。遵循这个基础来构建复杂的语句。

Answer 2

只是用户在所有加入后的位置

WHERE ANY_COLUMN_REFER_TO_USER_ID  = YOUR_NEEDED_ID

所以你的完整查询应该是这样的：

SELECT
    ControlAccess.UserName,
     ControlAccess.Pass,
     Users.First_Name,
    Users.Last_Name, 
    UserInfo.Age, 
     UserInfo.Country,
     UserInfo.Address,
     UserInfo.ZipCode,
    Sessions.Matrix1,
    Sessions.Matrix2,
    Sessions.Result,
    Operations.Operation,
     FilePath.LocationFiles
   FROM MatrixUsers.UserInfo
    INNER JOIN MatrixUsers.Users
    ON UserInfo.idUserInfo = Users.idUsers
    INNER JOIN MatrixUsers.ControlAccess
    ON ControlAccess.idControlAccess = UserInfo.idUserInfo
    INNER JOIN MatrixUsers.Sessions
    ON Sessions.idSessions = ControlAccess.idControlAccess
    INNER JOIN MatrixUsers.FilePath
    ON FilePath.idFilePath = Sessions.idSessions
    INNER JOIN MatrixUsers.Operations
    ON Operations.idOperations = FilePath.idFilePath
    WHERE UserInfo.idUserInfo = 1

从多个表中为 1 个特定用户选择数据

Selecting data for 1 specific user from multiple tables

mysql

inner-join