编辑sql文件时出现游标错误

DECLARE myCursor CURSOR FOR
SELECT column1, column2 FROM myTable;

OPEN myCursor;

FETCH NEXT FROM myCursor INTO @var1, @var2;

WHILE @@FETCH_STATUS = 0
BEGIN
    -- 处理数据
    PRINT @var1 + ' ' + @var2;
    
    FETCH NEXT FROM myCursor INTO @var1, @var2;
END;

CLOSE myCursor;
DEALLOCATE myCursor;

DECLARE @rowCount INT;
SET @rowCount = 0;

DECLARE myCursor CURSOR FOR
SELECT column1, column2 FROM myTable;

OPEN myCursor;

FETCH NEXT FROM myCursor INTO @var1, @var2;

WHILE @@FETCH_STATUS = 0
BEGIN
    SET @rowCount = @rowCount + 1;
    
    -- 处理数据
    PRINT @var1 + ' ' + @var2;
    
    FETCH NEXT FROM myCursor INTO @var1, @var2;
END;

IF @rowCount = 0
BEGIN
    PRINT 'No rows found.';
END

CLOSE myCursor;
DEALLOCATE myCursor;

DECLARE @done INT;
SET @done = 0;

DECLARE myCursor CURSOR FOR
SELECT column1, column2 FROM myTable;

OPEN myCursor;

FETCH NEXT FROM myCursor INTO @var1, @var2;

WHILE @@FETCH_STATUS = 0 AND @done = 0
BEGIN
    -- 处理数据
    PRINT @var1 + ' ' + @var2;
    
    FETCH NEXT FROM myCursor INTO @var1, @var2;
END;

CLOSE myCursor;
DEALLOCATE myCursor;