importing csv file with custom delimiter in mysql - mysql

Question

I'm doing mysql in my terminal as well as in my cmd.
I have a table :
mysql> create table stu (sno int, name char(10));
It's CSV file (b.csv):
sno, name
1,a
2,b
3,"c,d"
I imported that in mysql :
mysql> load data local infile 'd://b.csv' into table stu fields terminated by ',' enclosed by '"' lines terminated by '\n' ignore 1 rows;
Query OK, 3 rows affected (0.05 sec)
Records: 3 Deleted: 0 Skipped: 0 Warnings: 0
mysql> select * from stu;
+------+------+
| sno | name |
+------+------+
| 1 | a |
| 2 | b |
| 3 | c,d |
+------+------+
3 rows in set (0.00 sec)
When I change the default delimiter alone :
I have another file with a custom delimiter and a custom quotechar (a.csv):
*rno*-*name*
*1*-*ron*
*3*-*vince*
*5*-*Abi-nav*
when I import this into mysql,
mysql> load data local infile 'd://a.csv' into table stu1 fields terminated by "-"
enclosed by "*" lines terminated by '\n' ignore 1 rows;
Query OK, 2 rows affected, 1 warning (0.05 sec)
Records: 2 Deleted: 0 Skipped: 0 Warnings: 1
mysql> show warnings;
+---------+------+---------------------------------------------------------------------------+
| Level | Code | Message |
+---------+------+---------------------------------------------------------------------------+
| Warning | 1262 | Row 1 was truncated; it contained more data than there were input columns |
+---------+------+---------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> select * from stu1;
+------+------------+
| sno | name |
+------+------------+
| 1 | ron*
*3 |
| 5 | *Abi-nav*
+------+------------+
2 rows in set (0.00 sec)
I get this problem only when I change the default quotechar from " into other characters in both Ubuntu and in Windows.
Why I get this warning and this output??? How to solve this?
Thanks in advance
EDIT :
I tried as said by in the answer:
mysql> select version();
+-------------------------+
| version() |
+-------------------------+
| 5.7.31-0ubuntu0.16.04.1 |
+-------------------------+
1 row in set (0.04 sec)
mysql> load data local infile '/home/data.csv' into table stu fields terminated by "-" enclosed by '*' lines terminated by '\n' ignore 1 rows;
Query OK, 3 rows affected (0.19 sec)
Records: 3 Deleted: 0 Skipped: 0 Warnings: 0
mysql> select * from stu;
+------+---------+
| sno | name |
+------+---------+
| 1 | ron |
| 3 | vince |
| 5 | Abi-nav |
+------+---------+
3 rows in set (0.00 sec)
Then here you go :
mysql> load data local infile '/home/a.csv' into table stu fields terminated by "-" enclosed by '|' lines terminated by '\n' ignore 1 rows;
Query OK, 2 rows affected, 1 warning (0.09 sec)
Records: 2 Deleted: 0 Skipped: 0 Warnings: 1
mysql> show warnings;
+---------+------+---------------------------------------------------------------------------+
| Level | Code | Message |
+---------+------+---------------------------------------------------------------------------+
| Warning | 1262 | Row 1 was truncated; it contained more data than there were input columns |
+---------+------+---------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> select * from stu;
+------+------------+
| sno | name |
+------+------------+
| 1 | ron|
|3 |
| 5 | |Abinav|
|
+------+------------+
2 rows in set (0.00 sec)
Again I got the warning. Why that happens???

Answer 1

*-*name*
*1*-*ron*
*3*-*vince*
*5*-*Abi-nav*
mysql> select version();
+-----------+
| version() |
+-----------+
| 8.0.20 |
+-----------+
1 row in set (0.00 sec)
mysql> create table stu1 (sno int, name char(10));
Query OK, 0 rows affected (1.23 sec)
mysql> load data local infile '/data/data.csv' into table stu1 fields terminated by "-" enclosed by "*" lines terminated by '\n' ignore 1 rows;
Query OK, 3 rows affected (0.07 sec)
Records: 3 Deleted: 0 Skipped: 0 Warnings: 0
mysql> select * from stu1;
+------+---------+
| sno | name |
+------+---------+
| 1 | ron |
| 3 | vince |
| 5 | Abi-nav |
+------+---------+
3 rows in set (0.00 sec)
it is working in mysql version - 8.0.20

Answer 2

Under windows i needed to change termination. so that it runs
MySQL 8.0.22
Load data infile 'C:/ProgramData/MySQL/MySQL Server 8.0/Uploads/a.csv'
into table stu
fields terminated by "-"
enclosed by "*"
lines terminated by '\r\n'
ignore 1 LINES;
The main problem that i see, is that we can't see your csv file further you seem to switch between operating system Windows and linux.
Like i showed in my example the csv was produced in windows and had so \r\n as line termination, and this is what the MySQL interpreter had problems with, when i used \n\allone.
It had nothing to do with field termination or enclosure.

Answer 3

Your problem can be due to line termination (on Windows \r\n, on Unix/Linux \n)
You can try with a program like Notepad++, set the line termination to \n.
After delete all line break and recreate the line break.
If the load statement works, that was the issue.