Question

我正在将CSV文件导入Heidi SQL。我使用以下代码创建了表：

create table all_data
    (
        Keyword varchar(1000),
        Position int,
        Previous_Position int,
        Search_Volume int,
        KW_Difficulty float,
        URL varchar(1000),
        Post_title varchar(1000),
        Post_URL varchar(1000),
        Genre varchar(1000),
        Location varchar(1000),
        Avg_Daily_Visitors float,
        pageviews int
        )
;

但是在Avg_Daily_visitors列中，它有“\ N”，其中没有值。我一直用这段代码导入数据：

load data local infile 'C:/filepath.../All_Data.csv'
replace into table all_data
fields terminated by ','
    enclosed by '"'
    escaped by '"'
lines terminated by "\r\n"
ignore 1 rows
set
    Avg_Daily_Visitors = replace(Avg_Daily_Visitors,"\N",0),
    pageviews = replace(pageviews,"\N", 0)
;

但它没有用0替换值，这是我想要实现的。如何让Heidi SQL在导入时用“0”替换“\ N”？

感谢。

Answer 1

首先将您读取的值分配给变量，然后处理该变量。为此，您可以指定目标表的列，但是要指定一个变量而不是要替换的列。

load data local infile 'C:/filepath.../All_Data.csv'
replace into table all_data
fields terminated by ','
    enclosed by '"'
    escaped by '"'
lines terminated by "\r\n"
ignore 1 rows
(column_1, column_2, @variable1, @variable2, column_5)
set
    Avg_Daily_Visitors = replace(@variable1,"\N",0),
    pageviews = replace(@variable2,"\N", 0)
;

如何查找和替换我使用mysql导入的CSV

1 个答案: