如何解决使用LOAD DATA LOCAL INFILE在mysql中成功CSV导入后没有SQL查询结果
我的猜测是您的文件具有Windows换行符:
...0,2022,D,single\r\n
您尚未指定该LInes TERMINATED BY
'\r\n'
子句,因此MysqL可能默认为Unix样式(\n
),因此它实际上会导入single\r
您的列中。
您可以使用来检查确切的列内容HEX()
。
解决方法
在mysqldb中成功导入.csv文件的内容后,我遇到一个奇怪的问题。将csv文件中的数据成功导入到db表中,但是如果我在表上运行带有条件的任何SQL查询,则不会返回查询结果。我能够运行查询:
select * from mst_question
但如果指定了条件且满足条件,则不会返回任何结果
select * from mst_question where qtype='single'
该表具有行,其中列qtype包含条件文本“ single”,但不返回任何结果。
奇怪的是,如果我编辑表中的“ qtype”列内容并通过键入“ single”来替换测试“ single”,则该行将返回…… 对于我编辑的每一行!
我的.csv文件:
que_id,test_id,que_desc,ans1,ans2,ans3,ans4,true_ans,qtype,11,In which year is the HTML specification supposed to be complete and finalized?,2012,2015,2020,2022,D,single,Which of the following doctypes was introduced by HTML5?,<!doctype xhtml>,<!doctype html>,"<!doctype html PUBLIC ""-//W3C//DTD HTML 5.0 Transitional//EN"">","<!doctype html5 PUBLIC ""-//W3C//DTD HTML 5.0 Transitional//EN"">",B,How do you stop crawlers from following links to sites you don't want to be associated with?,"<a href=""#"" rel=""nofollow""> ","<a href=""#"" rel=""dontgo""> ","<a href=""#"" rel=""nogo""> ","<a href=""#"" rel=""noassociation"">",A,Which tag is used to define a section of the page that has content that is related but not critical to the main content in HTML5?,<article>,<sidesection>,<aside>,<section>,C,The <article> is used to contain a main article. What is the tag used to break it into sections?,<time>,single
我的LOAD DATA LOCAL INFILE语法:
LOAD DATA LOCAL INFILE 'quest.csv' INTO TABLE mst_question FIELDS TERMINATED BY "," OPTIONALLY ENCLOSED BY """" IGNORE 1 LINES
执行LOAD DATA LOCAL INFILE后的输出:
(5 row(s)affected)
(0 ms taken)
我的SQL查询(给出结果):
select * from mst_question
结果 :
(5 row(s)returned)
(0 ms taken)
我的SQL查询条件简单(没有结果):
select * from mst_question where qtype='single'
结果 :
(0 row(s)returned)
(0 ms taken)
我究竟做错了什么 ????
不能找到它。…请告知…
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