Question

我正在尝试编写一个代码来解析一个类中的某些数据，然后将解析后的数据插入到其他类的sqlite DB（以及其他任务）中。

我创建了一个sqlite类：

USE [Database]

DECLARE @name sysname
DECLARE @cntAll int
DECLARE @cntDist int
DECLARE @cntNull int
DECLARE @err int
DECLARE @stm nvarchar(max)
DECLARE @tblName sysname

SET @tblName = 'Table'

-- All rows
SET @stm = N'SELECT @cntAll = COUNT(*) FROM dbo.[' + @tblName + ']'
EXEC @err = sp_executesql @stm, N'@cntAll int OUTPUT', @cntAll OUTPUT
IF @err <> 0 BEGIN
    RETURN
END

-- Distinct rows by column
DECLARE columns_tables CURSOR GLOBAL FORWARD_ONLY READ_ONLY FOR
SELECT [name] FROM sys.columns WHERE object_id = OBJECT_ID('dbo.[' + @tblName + ']') 

OPEN columns_tables
FETCH NEXT FROM columns_tables INTO @name
WHILE (@@FETCH_STATUS = 0) BEGIN

    SET @stm = 
        N'SELECT @cntDist = COUNT(DISTINCT [' + @name + ']) '+
        'FROM dbo.[' + @tblName + '] '+
        'WHERE [' + @name + '] IS NOT NULL'
    EXEC @err = sp_executesql @stm, N'@cntDist int OUTPUT', @cntDist OUTPUT
    IF @err <> 0 BEGIN
        CLOSE columns_tables
        DEALLOCATE columns_tables
        BREAK
    END

    SET @stm = 
        N'IF EXISTS (' +
            'SELECT ([' + @name + ']) '+
            'FROM dbo.[' + @tblName + '] '+
            'WHERE [' + @name + '] IS NULL'+
        ') SET @cntNull = 1 '+
        'ELSE SET @cntNull = 0'
    EXEC @err = sp_executesql @stm, N'@cntNull int OUTPUT', @cntNull OUTPUT
    IF @err <> 0 BEGIN
        CLOSE columns_tables
        DEALLOCATE columns_tables
        BREAK
    END

    IF (@cntAll = @cntDist) AND (@cntNull = 0) BEGIN
        PRINT 'Possible column ' + @name
    END

    FETCH NEXT FROM columns_tables INTO @name
END
CLOSE columns_tables
DEALLOCATE columns_tables

????????

我需要将一些已解析的数据传递给DB_MNG.db_opertaor并相应地更新表格...

Answer 1

试试这个：

class Test1():
    def f1(self):
        print('Test1->f1()')

class Test2():
    def __init__(self):
        self.obj1 = Test1()
        self.obj1.f1()

首先创建类Test1，然后在类Test2中创建我创建Test1类的对象。

然后在从Test2类创建对象期间，您可以从第一个类运行方法：

obj2 = Test2()
>> Test1->f1()

如何从其他类访问一个类中的方法

1 个答案: