MYSQL使用记录之:infile/outfile

由于现有的东家要求使用MYSQL数据库，所以最近也开始了对MYSQL数据库的进一步的研究，首先介入的当然是一些正常的应用了：

outfile/infile的灵活：

今天接触了下mysql下的outfile和infile感觉和实际使用很贴切，不像ORACLE那么商业化，任何操作都要封装成自己的接口来实现、操作，MYSQL直接通过一个简单的语句就完成了数据的导入、导出，满足了日常的灵活性与可控性。

LOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE 'file_name.txt'

    [REPLACE | IGNORE]

    INTO TABLE tbl_name

    [FIELDS

        [TERMINATED BY 'string']

        [[OPTIONALLY] ENCLOSED BY 'char']

        [ESCAPED BY 'char' ]

    ]

    [LINES

        [STARTING BY 'string']

        [TERMINATED BY 'string']

    ]

    [IGNORE number LINES]

    [(col_name_or_user_var,...)]

    [SET col_name = expr,...)]

demo：

示例文件：

e.txt

===========================

1 2
1 2
1 2
3 4
1 2
3 4
3 4
==============================

ab

==============================

1,2;3,4

==============================

mysql> load data infile 'd:e.txt' into table test1;
Query OK, 7 rows affected (0.13 sec)
Records: 7  Deleted: 0  Skipped: 0  Warnings: 0
mysql> load data infile 'd:e.txt' replace into table test1;
Query OK, 7 rows affected (0.06 sec)
Records: 7  Deleted: 0  Skipped: 0  Warnings: 0
mysql> load data infile 'd:ab' replace into table test1 FIELDS TERMINATED  by ',' LINES TERMINATED  by ';';
Query OK, 2 rows affected (0.09 sec)
Records: 2  Deleted: 0  Skipped: 0  Warnings: 0
mysql> load data infile 'd:e.txt' replace into table test1 FIELDS TERMINATED  by ',' LINES TERMINATED  by ';' ignore 2
Query OK, 0 rows affected (0.00 sec)
Records: 0  Deleted: 0  Skipped: 0  Warnings: 0

outfile

mysql> select * into outfile 'd:out1.txt' from test1;
Query OK, 23 rows affected (0.00 sec)
mysql> select * into outfile 'd:out2.txt' FIELDS TERMINATED by ',' from test1
    -> ;
Query OK, 23 rows affected (0.00 sec)

mysql> select * into outfile 'd:out3.txt' FIELDS TERMINATED by ',' lines terminated by ';'  from test1
    -> ;
Query OK, 23 rows affected (0.02 sec)