MySQL中导出CSV格式数据的SQL语句样本如下：
select*fromtest_info
intooutfile'/tmp/test.csv'
fieldsterminatedby','optionallyenclosedby'"'escapedby'"'
linesterminatedby'\r\n';
select * from test_info
into outfile '/tmp/test.csv'
fields terminated by ',' optionally enclosed by '"' escaped by '"'
lines terminated by '\r\n';
MySQL中导入CSV格式数据的SQL语句样本如下,要导入的文件编码格式是UTF-8：
loaddata localinfile'/tmp/test.csv'
intotabletest_info
fieldsterminatedby','optionallyenclosedby'"'escapedby'"'
linesterminatedby'\n';
load data local infile '/tmp/test.csv'
into table test_info
fields terminated by ',' optionally enclosed by '"' escaped by '"'
lines terminated by '\n';
里面最关键的部分就是格式参数
fieldsterminatedby','optionallyenclosedby'"'escapedby'"'
linesterminatedby'\r\n'
fields terminated by ',' optionally enclosed by '"' escaped by '"'
lines terminated by '\r\n'
这个参数是根据RFC4180文档设置的，该文档全称Common Format and MIME Type for Comma-Separated Values (CSV) Files，其中详细描述了CSV格式，其要点包括：
(1)字段之间以逗号分隔，数据行之间以\r\n分隔；
(2)字符串以半角双引号包围，字符串本身的双引号用两个双引号表示。
文件：test_csv.sql
usetest;
createtabletest_info(
idintegernotnull,
contentvarchar(64)notnull,
primarykey(id)
);
deletefromtest_info;
insertintotest_infovalues(,'hello,line
suped
seped
"
end'
);
select*fromtest_info;
select*fromtest_infointooutfile'/tmp/test.csv'fieldsterminatedby','optionallyenclosedby'"'escapedby'"'linesterminatedby'\r\n';
deletefromtest_info;
loaddatainfile'/tmp/test.csv'intotabletest_infofieldsterminatedby','optionallyenclosedby'"'escapedby'"'linesterminatedby'\r\n';
select*fromtest_info;
use test;
create table test_info (
id integernot null,
content varchar(64) not null,
primary key (id)
);
delete from test_info;
insert into test_info values (, 'hello, line
suped
seped
"
end'
);
select * from test_info;
select * from test_info into outfile '/tmp/test.csv' fields terminated by ',' optionally enclosed by '"' escaped by '"' lines terminated by '\r\n';
delete from test_info;
load data infile '/tmp/test.csv' into table test_info fields terminated by ',' optionally enclosed by '"' escaped by '"' lines terminated by '\r\n';
select * from test_info;
文件：test.csv
,"hello,line
suped
seped
""
end"
,"hello, line
suped
seped
""
end"
在Linux下如果经常要进行这样的导入导出操作，当然最好与Shell脚本结合起来，为了避免每次都要写格式参数，可以把这个串保存在变量中，如下所示：(文件mysql.sh)
#!/bin/sh
#Copyright(c)codingstandards.Allrightsreserved.
#file:mysql.sh
#description:Bash中操作MySQL数据库
#license:LGPL
#author:codingstandards
#email:codingstandards@
#version:1.0
#date:.02.28
#MySQL中导入导出数据时，使用CSV格式时的命令行参数
#在导出数据时使用：select...from...[where...]intooutfile'/tmp/data.csv'$MYSQL_CSV_FORMAT;
#在导入数据时使用：loaddatainfile'/tmp/data.csv'intotable...$MYSQL_CSV_FORMAT;
#CSV标准文档：RFC4180
MYSQL_CSV_FORMAT="fieldsterminatedby','optionallyenclosedby'\"'escapedby'\"'linesterminatedby'\r\n'"
#!/bin/sh
# Copyright (c) codingstandards. All rights reserved.
# file: mysql.sh
# description: Bash中操作MySQL数据库
# license: LGPL
# author: codingstandards
# email: codingstandards@
# version: 1.0
# date: .02.28
# MySQL中导入导出数据时，使用CSV格式时的命令行参数
# 在导出数据时使用：select ... from ... [where ...] into outfile '/tmp/data.csv' $MYSQL_CSV_FORMAT;
# 在导入数据时使用：load data infile '/tmp/data.csv' into table ... $MYSQL_CSV_FORMAT;
# CSV标准文档：RFC 4180
MYSQL_CSV_FORMAT="fields terminated by ',' optionally enclosed by '\"' escaped by '\"' lines terminated by '\r\n'
