利用CSV存储引擎加载数据：
mysql>create table ld_csv1(id int not null default ‘0’,username varchar(5) not null,city varchar(6) not null,email varchar(50) not null) engine=csv default charset=UTF8;
$more /tmp/loaddata.txt > /data/mysqldata/3306/data/hugcdb/ld_csv1.CSV
mysql>select * from ld_csv1;
mysqlimport命令行工具导入数据：
mysql>create table ld_cmd(id int not null default ‘0’,username varchar(5) not null,city varchar(6) not null,email varchar(50) not null) engine=innodb default charset=UTF8;
mysqlimport导入数据要求数据文件名与表对象名相同
[mysql@mysql1 data]$ mysqlimport --help
$mysqladmin -usystem -p123456 -S /data/mysqldata/3306/mysql.sock hugc --default-character-set=gbk --fields-terminated-by=’,’ /tmp/ld_cmd.txt
fields-terminated-by
fields-enclosed-by
lines-terminated-by
SQL语句导入数据：
LOAD DATA INFILE ‘file_name’ INTO TABLE tbl_name;
(system@localhost) [mysql]> create table ld_sql(id int not null default ‘0’,username varchar(5) not null,city varchar(6) not null,email varchar(50) not null) engine=innodb default charset=UTF8;
(system@localhost) [mysql]> load data infile ‘/tmp/loaddata.txt’ into table ld_sql charset gbk FIELDS TERMINATED BY ‘,’;
(system@localhost) [mysql]> help load data
Name: 'LOAD DATA'
Description:
Syntax:
LOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE 'file_name'
[REPLACE | IGNORE]
INTO TABLE tbl_name
[PARTITION (partition_name,...)]
[CHARACTER SET charset_name]
[{FIELDS | COLUMNS}
[TERMINATED BY 'string']
[[OPTIONALLY] ENCLOSED BY 'char']
[ESCAPED BY 'char']
]
[LINES
[STARTING BY 'string']
[TERMINATED BY 'string']
]
[IGNORE number {LINES | ROWS}]
[(col_name_or_user_var,...)]
[SET col_name = expr,...]
LOAD DATA INFILE语句中默认的列分隔符是Tab符
通过CHARACTER SET子句，明确指定导入数据的字符集
在客户端本地导入数据
(system@localhost) [mysql]> load data LOCAL infile ‘/tmp/loaddata.txt’ into table ld_sql charset gbk FIELDS TERMINATED BY ‘,’;
如果启动MySQL时禁用了load-infile选项，就不再允许以LOCAL方式导入
如果指定LOCAL关键字，那就是从执行导入语句的客户端上读取文件
没有指定LOCAL关键字，那就是从运行MySQL的服务端上读取文件
如果指定了REPLACE子句，则出现重复值时会替换当前存在的记录
如果指定了IGNORE子句，则插入时遇到重复值会跳过重复的记录
数据文件的前N行不导入
(system@localhost) [mysql]> load data infile ‘/tmp/loaddata.txt’ into table ld_sql charset gbk FIELDS TERMINATED BY ‘,’ ignore 4 lines;
列和行的精确处理
FILES TERMINATED BY
ENCLOSED BY
ESCAPED BY
LINES TERMINATED BY
STARTIING BY
SQL语句导出数据：
select … into outfile
(system@localhost) [mysql]> help select;
Name: 'SELECT'
Description:
Syntax:
SELECT
...
[FROM table_references
[PARTITION partition_list]
[WHERE where_condition]
[GROUP BY {col_name | expr | position}
[ASC | DESC], ... [WITH ROLLUP]]
[HAVING where_condition]
[ORDER BY {col_name | expr | position}
[ASC | DESC], ...]
[LIMIT {[offset,] row_count | row_count OFFSET offset}]
[PROCEDURE procedure_name(argument_list)]
[INTO OUTFILE 'file_name'
[CHARACTER SET charset_name]
export_options
| INTO DUMPFILE 'file_name'
| INTO var_name [, var_name]]
[FOR UPDATE | LOCK IN SHARE MODE]]
(system@localhost) [mysql]> select * from ld_t1 into outfile ‘/tmp/ld_t1_out.txt’ fields terminated by ‘,’ optionally enclosed by ‘”’;